I agree with relax, I actually pretty much learned on backtrack. I was a skid, as most starters are, and thought I was going to be EP1C PWNZR with my new linux hack tool (even though I had no idea to use it). So I sat down, and learned every tool that came with instructions. Remember them all? haha no. but it introduced me to several principles, methods and all kinds of other stuff that eventually led me into what I am today.