Pros: Strong, last forever
Cons: Take forever to break in
Once I settled on these grips, I never bought a different brand.
I'm pretty large for a gymnast, so I'd typically go through grips like no other. However, my first pair of bulldogs changed that. It took me a lot longer than usual to break them in, but once I did, those suckers lasted me forever. The buckles are nice in that you don't have to constantly fidget with them, and there's no velcro to have to tape down once it goes bad.
Bottom line is that if you can get past the first week of using them, you'll have a pair you can rely on for a long time.