How is it? I don't really know much about the Resident Evil games, but it looks promising, and I'm always looking for new 3DS games.
It is amazing with the Cirle Pad Pro, probably the best 3DS game Ive played, more than Mario Land, Mario Kart and Ocarina of Time. I think without the extra joystick, I would not enjoy it nearly as much. The Circle Pad has two triggers on the back just like a PS3 controller, with the second analog stick, you can move aim and shoot all at the same time.
I can't wait for MGS Snake Eater to come out on the 3DS, it utilizes the Circle Pad Pro too.
If you can find one, pick one up and this game, or download the demo, its free on the Nintendo EShop