I love the over exposed background here - it's hard to get away with this but you have done it well. Great lighting on the guitar exposing just enough detail. Well done (10)
This could be a little sharper all around, and the strings are a little overexposed or over processed in some ways. On the upside, I really like the way you created shadows along the outside of hte guitar's body. Perhaps the same light setup with slightly diffused lights would help.
There may be multiple light sources, but they're not well used. The photo is too washed out and the subject matter isn't interesting enough to make up for it. Score 3.