Most the guys I run with say that if you are going up a hill and bounce, those revolver / hinge setups will unload suddenly and violently, and you probably don't want to be in the vehicle when that happens. However, like has already been said, others will swear by them. My vote is do a lot of research before considering doing that to your rig; ask a few hardcore/experienced wheelers, Google it til your fingers hurt, search other offroad boards as well as this one.
Personally, what I lack in flex I make up for with the locker. Just my opine hehe.