Bought the controller out of curiosity. Dunno if it'll actually work out. I don't expect it to be a replacment for my beloved 360 pad. I take the controller as an addition to the family. Time will tell.
If you're interested, I wouldn't trust early reviews. Especially from consumers like steam review. I guess a lot of people will start a shooter, get wrecked hard and start to complain horribly... It'll take time until you're familiar with the new controls.