I've got one. It's very basic, not many frills. The basic beat patterns it comes with are all variations on 4/4. If you want anything else, you might be able to program it to do so, but I haven't tried. I'm by no means a drummer, and daunted by the thought of tapping in my own pattern. That said, it works well, and you can adjust the tempo and volume easily. Good for practice on songs where keeping the beat is a bit more of a challenge due to syncopation, back beats, etc.
George