I figured I would give you an update on how I am going with my nail biting, or more to say me trying to give it up!
The Stop biting stuff is defiantly a turn off, and it does make you think twice about sticking your fingers in your mouth, but in saying so - When your at McDonald's and your eating a Big Mac (which I do far too often) and you get the special sauce on your fingers and you go to suck it off.... Yep not good! :( The other thing I have noticed, while I am not sticking my fingers in my mouth as often it is really hard to break the picking habit as you will see from the picture below. My Thumb and forefinger are doing great but my other two seem to be copping it a bit.
I will keep you updated how I am going, maybe, just maybe I may one day get nice hands :D