When I first used G2, I also thought something was wrong with the heli, no matter which one I tried. After hours & hours of practice, I was finally able to hover and keep it relatively still. Like Spaceman Spiff said you can also calibrate your controller. Sorry I don't remember where it is either, at work now. Also another thing that helps is make a copy of a heli, and then you can "modify" it. The one thing I've done from the start is make it bigger. I use 2.0, any bigger than that it seems to act & look a little funny. But I've read where people shoot it up to 3.0. Anyway, just keep practicing, and use the Trainer dude. He explains a few basic things that really help. He taught me how to hover Now I'm going to use him for forward flight. Hope this helps.
Joe