I have the "Leadergrip" system, very similar to the Red Snapper system. I really like them and wouldn't do without them.
As noted by others, the grip part is a little stiff at first, but what I did was buy a length of dowelling and put the lengths of gripper on them to slightly stretch them out a bit before using - that really helped to make them easier to put on. I just put a length on the dowelling and left it for a few days before I wanted to use it. After awhile, I'd managed to use the dowelling on all the rods.