It's a damn slippery little thing isn't it? I was surprised...it tried slipping out of my hands every chance it got, no matter how I held it. Coming from the BB Bold 9000 with that fake carbon leather/whatever back that comes default on it, this was hard for me to get used to.
A case fixes it, but it adds a ton of bulk. I even got the Impact case from Otterbox (which is supposed to be the least bulky they have, I believe) and it is still bulky looking to me, and it doesn't allow the HD multimedia dock or the vehicle dock to work, so I have to take it out and put it back in. Luckily, it takes all of 2 seconds to take it on and off.