Debs recommendation:

It's powerful and it's waterproof. We like this one over other waterproof vibrators because it is very well made and because the case is hard plastic it makes the vibration much more direct to the places it needs to be! The functions and power are all good too.

Drawbacks:

The only drawback we could come up with is that it isn't a rabbit, but as a standard vibrator that is also waterproof it's fantastic.