I am a hygienist and just got braces recently. I use this to remove food debris after eating. It uses a high pressure stream of water. The reservoir could be larger but I don't have any problems with it. I simply just refill it because I am at the sink cleaning my teeth anyways. I wouldn't recommend this product as an alternative to flossing.

I bought this product at walmart for less than $30. Took it home and it worked great for 3 days. Then stopped. Immediatly returned it for a full refund. The product idea is great, but needs to go back to the drawing board.

I have just finished with my 4TH Waterpik WP360W. The first lasted 6 months, so we bought another one. The second lasted about the same, and this time I had it replaced by warranty (they are pretty good about that, at least). The third one lasted about 7 months, again I returned it under warranty and they sent me another. But I've finally had it as this one has lasted maybe 5 months. Each time, the battery either refuses to continue to charge and you get a weak jet or the whole think just dies (sometimes I can get it started again by banging the base on the counter). The idea of oral irrigation is great, I have much better dental appts since using it (my gum lines have lowered) and its great for a kid who doesn't like to floss - my son uses it twice a day. But I will not buy a waterpik again.

I wish I had read these reviews prior to purchasing. As others have mentioned, in order to adequately clean your mouth, the reservoir must be filled up repeatedly (at least 4 times), the angle the unit has to be held is awkward and not well thought out, the unit has very little power (I've not even used the "gentle" tip) even when fully charged. I can see where this would be helpful when traveling, for every day home use, it falls short. Thankfully, the unit was inexpensive, but it will be going into my closet until the next time I travel and I'll go back to the reliable (and powerful) countertop model.

I own this item and it works well. It has as much power as full size irrigators and it's really easy to clean. My only complaint is that the water tank is too small. It forces you to fill it up several times in order to irrigate once.