The TOTO Washlet S5 is the premium pick - a full electric bidet seat that replaces your toilet seat and adds a heated seat, instantaneous endless warm water, a warm-air dryer, automatic deodorizer, and self-cleaning wand tech (EWATER+ and PREMIST). Wirecutter named it the best bidet seat. It costs roughly ten times an attachment and needs a power outlet, and a few owners report leaking over time, but for the full luxury experience nothing here is close.
Full review
Real-World Performance
The Washlet S5 is a different class of product from the attachments here - a fully electric seat with an instantaneous water heater that delivers endless warm water at 95 to 104 degrees, rather than the finite or plumbing-dependent warmth of non-electric units. The wash itself offers front, rear, and soft-rear modes with both oscillating and pulsating options, all controlled from a wireless remote with memory for up to four users. The New York Times Wirecutter named the S5 the best bidet seat, a reflection of how consistently it performs.
Beyond the wash, the heated seat (adjustable 82 to 97 degrees) and the warm-air dryer (three temperatures up to 140 degrees) round out an experience that genuinely replaces toilet paper for many owners. BidetKing, which ranks it among the year's best seats, calls it 'an excellent mid-range bidet from TOTO USA,' and owner reviews describe it as a 'game changer.'
The oscillating and pulsating spray options add a level of control no attachment can match - oscillation widens the cleaning area while pulsation provides a massaging effect - and the wireless remote stores personalized settings for up to four household members, so each person's preferred pressure, position, and temperature are a button-press away. It is this depth of customization, layered on top of the instant endless warm water, that separates a true washlet from even the best non-electric attachment.
Build Quality and Design
TOTO redesigned the S5 with a refined tankless profile that is 19% slimmer than older washlets, using less material while looking cleaner on the toilet. Because the heater is instantaneous rather than tank-based, there is no bulky reservoir, which is part of why the seat sits lower and more elegantly than budget electric seats.
The design includes genuinely useful self-cleaning technology: EWATER+ electrolyzes the water to auto-clean the wand after each use, and PREMIST sprays the bowl before you go so waste sticks less. A SoftClose lid, an illuminating night light, and the automatic deodorizer complete a package that feels considered and premium - this is a flagship-brand product, and it shows in the fit and finish. Every touch point, from the seat hinge to the remote, has the solidity you would expect from TOTO, the brand that effectively created the modern washlet category.
What Reviewers Loved
Reviewers and owners love the completeness of the experience. The endless instant warm water is the headline - no waiting for a sink line, no cold burst - and the heated seat plus dryer make it a full hands-free clean. Premier Bidets shows 90% five-star reviews (109 of 121), with owners specifically praising 'the heated seat and warm water,' and TOTO's own positioning emphasizes 'endless warm water, PREMIST for a cleaner bowl, and EWATER+ to cleanse the wand.'
The four-user memory, the night light, and the automatic deodorizer are the kind of touches that justify the premium for households that use it daily. Wirecutter's top-seat designation is the strongest third-party endorsement in this entire category, and it reflects a product that does everything a bidet can do, well.
Where It Falls Short
Cost and installation are the obvious barriers. At commonly $700 or more, the S5 is roughly ten times the price of a good attachment, and as an electric seat it requires a nearby GFCI outlet - bathrooms without one may need an electrician, adding cost and hassle. It also fully replaces the toilet seat, so installation is more involved than clipping on an attachment.
The most-cited functional concern is reliability: some owners report occasional water leaking over time, a recurring note across reviews that prospective buyers should weigh. It is not universal, but at this price the expectation of flawlessness is higher, and the leak reports are the one consistent blemish on an otherwise stellar record.
How It Compares to Alternatives
The S5 sits at the opposite end of the category from the attachments. The Luxe Neo 320 Plus and Tushy Classic 3.0 cost a fraction as much and cover the daily cleaning job, but cannot touch the S5's heated seat, dryer, deodorizer, or endless instant warm water. The Tushy Spa 3.0 is the closest non-electric approximation of the warm-water benefit, but its warmth is plumbing-dependent and finite where the S5's is instant and endless.
Against the budget Brondell SimpleSpa Thinline, the S5 is night-and-day - a luxury appliance versus a bare-bones sprayer. The honest framing is that the S5 competes on experience and the attachments compete on value; which one is right depends entirely on budget and whether you have an outlet.
There is no overlap in who these products are for: the attachments answer 'I want a clean rinse without spending much,' and the S5 answers 'I want the best bidet experience money can reasonably buy and I have the outlet for it.' Wirecutter's best-seat designation cements the S5 as the aspirational pick of the roundup, and for the buyer who can stretch to it and will use the features daily, nothing else here is in the same conversation.
Who It's Best For
The Washlet S5 is for buyers who want the full electric-seat experience - heated seat, warm-air dryer, deodorizer, and endless instant warm water - and who have a nearby outlet and the budget to match. It is the right pick for a primary bathroom where comfort is a priority and the bidet will be used by the whole household daily.
Skip it if you are price-sensitive (any attachment delivers the core clean for far less), if you lack a convenient GFCI outlet, or if you specifically want a renter-friendly, no-install option. For those buyers the Luxe Neo 320 Plus or Tushy Spa 3.0 make far more sense - but for the luxury experience, the S5 is the clear top of the category, and the one to buy when comfort and a fully featured daily-driver matter more than the upfront cost.
Value at This Price
Value here is a function of how much you use the features. At $700-plus the S5 is a major purchase, and for a buyer who would mostly use the basic wash, the value is poor versus a $65 attachment. But for a household that wants and will use the heated seat, the dryer, the deodorizer, and endless warm water every day, the per-use value over years of ownership is reasonable - this is furniture-grade bathroom equipment, not a gadget.
TOTO's flagship reputation and Wirecutter's best-seat endorsement support the premium, and street prices (often well below the $974 list) improve the math. The value case is strongest for committed daily users and weakest for the curious first-timer, who should start with an attachment and upgrade only if they decide they want the full experience.
Long-Term Reliability
TOTO is the most established name in the washlet category, and the S5's instantaneous heater and EWATER+ self-cleaning are mature technologies designed for years of daily use. The 90% five-star owner rating at Premier Bidets and the strong showing across retailers reflect generally durable real-world performance, and the self-cleaning wand and PREMIST reduce the maintenance burden over time.
The caveat is the leaking reports that surface in a minority of reviews - the one recurring long-term concern. Buyers should ensure a proper install and keep the warranty paperwork. With electric seats there are inherently more components that can fail than in a non-electric attachment, but among powered seats TOTO's reliability reputation is at or near the top of the category.
Strengths
- +Instantaneous water heater delivers endless warm water at 95-104F
- +Heated seat (82-97F) with warm-air dryer (three temps) and automatic deodorizer
- +Front, rear, and soft-rear washes with oscillating and pulsating options
- +EWATER+ auto-cleans the wand and PREMIST pre-mists the bowl to reduce sticking
- +Wireless remote with personalized memory for up to four users; named Wirecutter's best bidet seat
Watch-outs
- −Far more expensive than any non-electric attachment, often $700+
- −Requires a nearby GFCI power outlet - electrician may be needed
- −Some owners report occasional water leaking over time
- −Replaces the toilet seat entirely, so install is more involved than a clip-on attachment
How it compares
The luxury electric seat in this lineup - it adds a heated seat, warm-air dryer, deodorizer, and instantaneous endless warm water that no non-electric attachment can match, but it costs roughly ten times the Luxe Bidet Neo 320 Plus or Tushy Classic 3.0 and needs a power outlet; the Tushy Spa 3.0 approximates its warm water without electricity, and the Brondell SimpleSpa Thinline is its budget opposite.
Who this is for
At a glance: buyers who want the full electric-seat experience with a heated seat, dryer, and endless warm water and have a nearby outlet.
Why you’d buy the TOTO Washlet S5 (SW3446)
- Instantaneous water heater delivers endless warm water at 95-104F.
- Heated seat (82-97F) with warm-air dryer (three temps) and automatic deodorizer.
- Front, rear, and soft-rear washes with oscillating and pulsating options.
Why you’d skip it
- Far more expensive than any non-electric attachment, often $700+.
- Requires a nearby GFCI power outlet - electrician may be needed.
- Some owners report occasional water leaking over time.
Rating sources
“An excellent mid-range bidet from TOTO USA; this bidet is EVERYTHING - it's been a game changer for our family.”
“Rated five stars by 90% of reviewers (109 of 121), with owners praising the heated seat and warm water.”
“Endless warm water, PREMIST for a cleaner bowl, and EWATER+ to cleanse the wand, elevating hygiene and comfort in a refined tankless profile.”
Our 4.7 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
