Bio Bidet Discovery DLS Review: Smart Seat, Fair Price

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The Bio Bidet Discovery DLS made a name for itself by doing something simple: putting an auto open and close lid, a feature usually reserved for $1,000-plus seats, into a seat that sells for around $599. When it launched, reviewers noted that it undercut TOTO's flagship seats while matching much of what they did. A few years on, with Premier Bidets pricing it at $599 down from $899, that value argument is stronger than ever.

This is the smart seat for buyers who want the hands-free experience without the flagship price. Here is what stands out and where it asks for compromise.

What You Get for $599

The Discovery DLS is a fully featured electric bidet seat with warm water rear and front cleansing, a heated seat, a warm air dryer, an adjustable stainless steel nozzle, a nightlight, and a slim 4.7-inch rear profile. It is controlled from a wireless remote with side-panel backup.

The headline is the motorized auto open and close lid and seat. Press a button and the lid raises; the seat follows or stays down as you choose. The motion is smooth and deliberate, so the lid and seat do not clatter against each other. At this price, that level of automation is rare.

The DLS is also notably low. At 4.7 inches in the rear, it is Bio Bidet's slimmest seat and nearly as low-profile as far more expensive flagships, which helps it look built-in rather than bolted on.

Unlimited Warm Water and the Dynamic Stream

Like the better seats in its class, the DLS uses an instant water heater rather than a tank, so it delivers unlimited warm water without running cold mid-session. You are not waiting on a reservoir to reheat between users.

Its more unusual trick is the dynamic stream, which rapidly alternates the water temperature between warm and cool during a wash. Some people find the shifting temperature genuinely soothing; others leave it off and run steady warm water. Either way it is a differentiator you will not find on most competitors, and it costs nothing to ignore if it is not for you.

Hygiene: Stainless Nozzle and UV Sterilization

The DLS cleans its own wand two ways. The stainless steel nozzle is self-cleaning between uses, and a UV light sterilizes it to keep bacteria in check. Stainless steel is easier to keep clean than plastic and does not absorb residue the way some cheaper nozzles can.

This is a different approach from TOTO's EWATER+, which sanitizes with electrolyzed water, but the goal is the same: a wand that stays sanitary without you scrubbing it. For more on what actually keeps a bidet hygienic, see our explainer on whether bidets are sanitary.

Wash Performance

The DLS offers rear and front cleansing with an adjustable stainless steel nozzle. You can tune water pressure, nozzle position, and temperature, and optional nozzle oscillation widens the coverage area by sweeping the wand back and forth.

The front cleanse is gentler and positioned for feminine washing, which makes the DLS a reasonable pick for the bidet for women use case. The instant heater means the warmth holds steady through a longer wash.

Comfort Features

Heated Seat

The adjustable heated seat takes the edge off a cold morning, and an occupancy sensor activates the wash functions only when you are seated, which also saves energy.

Warm Air Dryer

An adjustable warm air dryer finishes the wash so you can cut down on toilet paper. As with any bidet dryer, a full dry takes time, so many users pat dry and let the dryer handle the rest.

Nightlight and Slow Close

A cool white LED nightlight shines into the bowl for nighttime visibility, and the slow-closing mechanism keeps the motorized lid quiet and gentle.

The Five-Year Warranty

The DLS's quietest advantage might be its best. Bio Bidet backs it with a five-year full warranty that covers 100 percent of parts and service for five years from purchase. Most competing seats, including TOTO's, ship with a one-year warranty.

On a seat with motorized moving parts, that long coverage is reassuring. It tells you the manufacturer expects the mechanism to last, and it removes much of the risk that usually comes with buying an automated seat from a non-flagship brand.

Installation

The Discovery DLS installs on a standard elongated toilet in about 20 to 30 minutes. You will need a GFCI outlet within about three feet, a standard water supply connection via the included T-valve, and basic tools.

If your bathroom lacks a nearby GFCI outlet, budget $150 to $300 for an electrician, the same as for any electric seat. Our bidet seat installation guide covers the full process.

Specs at a Glance

Who Should Buy the Bio Bidet Discovery DLS

It is best for:

• Buyers who want a motorized auto open and close lid without a flagship price
• Anyone who values a long warranty on an automated seat (five years here)
• People who want a stainless steel nozzle with UV sterilization
• Shoppers cross-comparing it against TOTO and Brondell at the same price

You should skip it if:

• You have a round toilet bowl (the DLS is elongated only)
• You prefer the fewest moving parts possible (a manual-lid seat like the Washlet C5 avoids the motor)
• You specifically want TOTO's PREMIST and EWATER+ (consider the Washlet S5)

How It Compares

At around $599, the DLS goes head to head with TOTO's Washlet S5.

The DLS wins on automation, nozzle material, and warranty length. The S5 wins on TOTO's proven PREMIST and EWATER+ hygiene tech and the round-bowl option. If the auto lid and the long warranty are your priorities, the DLS is the better buy. If hygiene technology and brand pedigree matter more, the S5 earns its slightly higher price.

For the wider field, see our best electric bidet seats guide.

The Bottom Line

The Bio Bidet Discovery DLS does one thing exceptionally well: it brings the auto open and close lid down to a price most buyers can stomach, and it backs the gamble with a five-year warranty almost no competitor matches. Add unlimited warm water, a stainless steel nozzle, and UV sterilization, and you have a genuinely smart seat for around $599.

It is elongated only, and the motorized lid means more moving parts than a basic seat. But if you want the flagship experience without the flagship invoice, the DLS is the value play in smart bidet seats.

New to electric seats? Our guide on how to choose a bidet will help you confirm a smart seat is the right fit before you buy.