My Fuzzi Bunz are fabulous diapers. They are easy to use and clean, and always reliable. If I need a diaper that I KNOW will work, and won't leak, I always reach for a FB. In fact, my ideal stash would be 100% Fuzzi Bunz, but I just don't have the $$$ for all pocket diapers.
My DD is tall and skinny, but FB's have separate adjustments for the waist and the legs, so you can customize the fit much more than other snap diapers. I agree with the PP though that you should buy one or two of different ones and try them, because you never know what's going to work best for you.