Rabbits are tricky, since it's all too easy to fall into the "wrong anatomy trap" (that is, it can be hard to find one that fits you vaginally while allowing the clit attachment to reach you). There's also the question of whether the shaft rotates, thrusts, or just vibrates. Most rabbit users have a function that they prefer over the others.
Rabbit vibes are a gamble, but I think they're at least worth a try. I've got three: one
that barely fits and feels "just all right" at best, one
that fits better and feels pretty good, and one
that fits perfectly and is currently fighting valiantly for the title of "favorite vibrator."