I'm not currently, but they look worth doing. My grip let me down a lot when I first started training and I thought it had sorted itself recently. Not quite it seems, I want to get a set of heavy grips to train with aswell but will have to wait until I've got some disposable.
I have improved my forearm and wrist strength some what after just a few weeks. The reverse wrist extensions in particular are killer. They seem easy until you hit your 7th or 8th rep then I just can't seem to get the weight up anymore
