just downloaded it and the drag lock you still have to hit the lock button on the blackberry. there is no icon to click to lock the phone.
I am using Slide2Open. It's good with number of option to unlock like slide, pass code, trackpad... Only problem using slide that you have to stretch your thumb from left bottom screen to the right...
I use slider lock and I have it set to lock when the back light goes off. I set the app "extrakeys" to use the volume keys to turn the back light off. The combination works well together and I do not get any more pocket dials.