Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Q: For me, this is pretty much a sure thing. Sometimes I use the rotating beads. Sometimes I don't. It just depends on my mood. The rabbit vibration is stronger when the beads are turned off. The size of the item is pretty long/thick and I do prefer this size to some of the other items I have. My current favorite item. Haven't tested to see if it's waterproof ... too worried that it'll stop working and then I'll be SOL.
A:
Positive