Iron mind products

[Shaolin-Do]

Have any of you ever tried the gorilla grip, and the pinch grip from iron mind?
Oh yeah, and the negatives.
If so, how do you feel they worked?
(im ordering captains of crush this week)

[Ford Prefect]

I've only used the Captains of Crush, but they are great. I've only heard good things about all iron mind's grippers.