I love my Mantric Rabbit and two Happy Rabbits. Ian has given a good break down on them but I'm just gonna add my little points:
Mantric Rabbit: https://www.lovehoney.co.uk/product.cfm?p=37962
-Looks cool and furturistic with each setting having a different coloured light
- Bulbous head
- You can't control the ears and shaft separately
- Firm body
It's also shaped for g-spot stimulation but it doesn't reach mine. However, something about its shape or vibes just drives me wild.
Happy Rabbit G-Spot: https://www.lovehoney.co.uk/product.cfm?p=29418
- Lots of g-spot pressure and it feels like it "makes" you orgasm
- The ball tip can feel a bit uncomfortable like it's "hooking" you. May not be suitable for a beginner
Happy Rabbit Curve: https://www.lovehoney.co.uk/product.cfm?p=29419
- Very comfortable to use
I would also like to add that the Happy Rabbits have the best ears in regards to softness/firmness and feel just right on my clitoris. You can also control the ears and shaft separately. There are lots of shaft patterns but only 3 constant speeds for the ears.
Hope this helps and good luck with your rabbit.