Waterpik Water Jets -- Anyone use them?

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I recently bought one of these during a boredom-induced browsing stint on Amazon. I don't know anyone who uses one, but it looked cool enough.

This is the one that I bought: Waterpik



I've had it for like two days and it does seem to do a pretty good job cleaning in between gums. My mouth definitely feels very clean after using it. I don't think I *need* to use it because I've never had a cavity and I've always been a regular brusher/flosser/Listerine user, but this thing apparently does a much better job at cleaning gums than flossing does. I also don't really like flossing that much, although using a Reach flosser does help to relieve it's annoyingness.

Does anyone have experience with water jet and Waterpiks in particular? If so, what were your results?