Jack RabbitOne should definitely know their size limitations before ordering this toy. If you like it a little rough, this might be the toy for you.
Unfortunately, I found that the Jack Rabbit turned out to be more painful than pleasurable. I ended up having to buy an identical replacement of my old, slightly disappointing but reliably predictable standby. The Jack Rabbit's exterior was too hard, and the pearls inside (when in motion) felt like I was taking a beating in all the wrong places. Also, it had a very strong chemically odor that never went away, and transferred to the other toys in the toy box. I ended up having to get rid of it altogether.
I don't think that my disappointment has anything to do with the toy itself, though it was just too big for me. Had it not been for the lingering chemical smell that never went away even after several cleanings, I would have still enjoyed it on occasions with only the clit vibe going, but with everything running at once it felt like a harsh abusive power tool.
I do like to dabble in BDSM though, and have often thought that this could be the perfect tool for use in a sadistic scenario, giving pain at the same time as pleasure.