Tom wrote a review of Petzl Grigri 2 Belay Device on June 6, 2013
I originally bought a Grigri because I wanted to try it more because I read what other people were saying about how much they liked. Well and it was on sale which does not happen often. After first getting it and trying it out I absolutely hated it. I liked belaying with it but could not stand lowering for the life of me. I put it with all my gear not knowing when I would use it again.
A couple months later for a lead climbing instructors class we were tested with an ATC and a Grigri. This is where I fell in love with it. Once you get a hang of the lowering part it is so easy and it catches big falls so much better than the regular ATC.
All in all I am really happy with my purchase even if it took me a while to see that. However, if you are a beginner learn with an ATC first it is still and important skill to have!!!