People knock it... Don't believe them!
This is by far the best belay device on the market... You constantly hear people saying, "there are just as many accidents with the GriGri than with an ATC, so why spend the money when they are equally as safe?"
That is bullshit. Period.
These are the people who haven't splurged on the best belay device on the market, plain and simple.
It's light weight, safer, practical, multifaceted, etc... Spend the money and get yourself a Petzl Gri Gri!