I'm 19 and have been playing for almost four years. I would almost say that I am quite good; I am a useful player in some circumstances as I actually know waht I am doing. I have a wierd cracking sound in my left wrist (like a series of light cracks) when I strecth it in a particular way, but my doctor said it was nothing more than a slightly relaxed tendon and is nothing to worry about. I also occaisionally get a pain in my shoulder and I am doing a lot of work in making sure it is relaxed and it is getting better.