LOUD!!!
Holy moly, this thing is loud. It might not really matter to some people, although I think this could possibly wake your neighbors, but I have an en suite bathroom and there is no way I can use this thing in there if my boyfriend is already asleep.  He can sleep through a lot, but not a lawnmower running in the same room.  I am just surprised because previously, I had two portable rechargeable water picks and they were not exactly quiet, but nothing like the volume of this.  Unfortunately, they both stopped working after about a year of use, so I decided to try this one thinking it would be sturdier.  I do think it works well and I like that it comes with several choices of attachments, storage and carrying cases, and is easy to operate and adjust power.  It is just the noise that is my complaint. 🙉
Rating: 4 stars