"Cons:
- The squeeze action on this one is pretty weak as it is just a foam ball." mgoodro

You're right. But thats not what it is made to do. the sole purpose is to balance the opening and closing strength of the fingers. The opening muscles are at a total disadvantage already. Adding more resistance for the closers would only put the openers farther behind.

Very useful product, does what it supposed to. unfortunately if you're one of those people who likes to see results, you'll be disappointed. The effects of what the grip saver is meant to do is a very hard thing notice. You will just have to use it it frequently and constantly with the mindset that it is helping with injury prevention.
4/5 "...and yes the finger loops are kind of tacky and irritating."

Pros: been said
Cons: Ball falls apart fairly quickly. Mine has huge cracks in it that make it even easier to squeeze.

great idea...but needs a little more resistance on the squeeze...could be made a little easier to put on a remove as well....has helped more than one finger injury however

I agree with both mgoodpro and slacklinejoe that the squeeze action isn't great. However, I think it is important to recognize that, as climbers, we get too much squeezing the rest of the time, and it's really really important to get extension, which is where this comes in. Metolius has recognzed a crucial hole in most climbers training, and one that is essential for injury prevention. And no, I don't work for them, have stock in them, or any of that stuff...

For opposing muscles, it's very good. For contracting grip muscles it's nearly worthless. I started using it as a carpal tunnel rehab thing. I think it's helped quite a bit at getting my opposing muscles better balanced. From my research on it though, don't plan on it making you climb harder, but plan on it making injuries less common. Mis-blananced hand muscles are blamed for a lot of the climber's hand injuries.