A friend bought one a few months ago and let me shoot it a couple of times. It looks like it should weigh a fair amount, but it is quite light. I think this is why I find it recoils slightly more than my 686.
The energy does go pretty much straight back into your hand, very little muzzle flip at all. Follow-up shots are right there, right now. I think this is also why I find it recoils a bit more. With a "traditional" style revolver with the barrel up top your wrists absorb some of the energy as the barrel flips up, your wrists being a pivot point of sorts. With the Rhino I found that with basically no "flip" at the front the recoil energy was more or less going straight back into your palm and up your arm. Just my take on it.
It's a very unique firearm, I personally do like the idea of firing from the bottom of the cylinder, but with everything there is always a tradeoff.
The only negative thing I can say about it, other than the price, is I didn't like the "hammer". Which isn't the actual hammer by the way. It cocks whatever internally. When you press the "hammer" down, it feels like you're moving stuff. When I pull the hammer on my 686 I can't tell there are parts in there, just feels like one, solid motion.
If you already have a revolver or two and have some money to burn I say go for it! Very fun gun and it is a conversation starter for sure!