I have tried a number of brands.
Molicare were the first adult diaper that I ever tried. They are really absorbent, but I'm not crazy about the purple.
Next I tried the Abena X-Plus, and to date they are, in my opinion, the best adult diaper out there.
I've also tried the Secure X-Plus, which have a tape landing zone which allows for many readjustments, but I didn't find them to be all that absorbent.
The Abena Abri-wing's were nice, but just don't quite give you that "real" diaper feel. The newer abri-wing's were horrible. They were, however, fairly absorbent, but it's really not like wearing a diaper at all. There is no material on the sides, so that you're upper thighs are just about completely exposed.
I really would like to try the Bambino, but they're so expensive.