Pros

  • Provides strong and customizable water pressure with 10 settings for an effective and thorough clean.
  • Impressively improves gum health and removes up to 99.9% of plaque, delivering results that users and dentists notice quickly.
  • Useriendly features such as a one-minute timer with 30-second pacer and a convenient on/off button enhance ease of use.
  • Includes 7 different flossing tips to cater to various dental needs, including braces and multiple users.
  • The 36egree rotating tip handle reaches all areas of the mouth comfortably, even back teeth.
  • The design feels more compact and lighter compared to older models, fitting better on bathroom countertops and in cabinets.
  • The water reservoir is easy to fill and detach, with improved leak resistance and a driree design.
  • Durable construction holds up well under frequent use and cleaning is straightforward.
  • Leaves teeth feeling noticeably cleaner by effectively removing food particles and plaque.
  • ADA accepted and recommended by dental professionals for superior oral care.

Cons

  • Operates at a noisy level that some users find distracting compared to handheld or cordless alternatives.
  • Bulky overall design may feel cumbersome in smaller bathrooms or tight spaces.
  • Occasional leaking from the water reservoir reported, requiring careful maintenance and drying to prevent mold buildup.
  • Plastic tubing can break after extended use and replacing it is inconvenient, sometimes making replacement units more practical.
  • Storage for the included mouth tips is awkward and unhygienic, often requiring removal of the water tank to access them.
  • Sharing the device between users can be tricky due to the design of the mouth piece switching mechanism.
  • The water control button on the handheld piece can be hard to operate quickly and may be confused with the tip release button.
  • Some users feel the product’s design and functionality could be improved despite solid cleaning performance.

Bottom Line

The Waterpik Aquarius WP-660 is a powerhouse for at-home oral care—delivering excellent plaque removal, gum health improvement, and customizable pressure settings, all backed by ADA acceptance. While it is a bit noisy and bulky, and requires some care to avoid leaks or mold, it's generally a durable and reliable device that many users call their best Waterpik yet. If you want similar performance but crave quieter operation or more portability, check out the Waterpik Cordless Advanced 2.0 Water Flosser—still powerful but with a sleeker, more compact design.

Lowest at Amazon
$49.99 at Amazon
Lowest at any Popular Retailer
$48.37 at Bonanza

Where to Buy

Prices last updated: February 2nd 2026 6:24 am
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