[felixdcat]

Does it help? Which one should I take? How do you feel about it?

Thanks!

[Ben_Sir_Amos]

I can fret strings with my nose. You don't need huge muscles. You don't need to be able to crush the strings to play guitar. I think that this thing won't help you to hold chord shapes, only to squeeze the life out of the neck - and your playing. But it might help you to carry your guitar in one of those fancy (heavy) guitar flight cases.

[JessThrasher]

Yeah, I agree with Ben. Fretting a string is not strangling a chicken.

[eXperiment63]

Personally, I used one. It helped me a lot with barring. I turned it sideways and barred the 4 pieces that you push. takes a lot of strength to be able to do that, and it allowed me to barre at the 1st fret a lot quicker.

I also got the Callous building caps that you put on the gripmaster. It helped harden up my fingers faster.

While it doesn't take an extreme amount of strength to play guitar, those things can most certainly help build endurance and quickness(not playing speed, but how fast you can hammer on and pull off; and press and release in general).

[raybaro]

I used to used one when I was in boxing. Also to get a good grip on a gi.

Remember that no matter how strong your hands, fingers, etc are, you still need to know fingerings (chords, scales, runs).