Maybe it's only because I'm a musician myself, but for the purposes of this shot, I would really have elected to use an instrument without those hideous colored practice tape markings. They're sooooo distracting to me. But again, maybe it's becaue I'm a musician. Some creative cloning might be able to remove them from even this shot, which, overall, is a very solid 7 for me.
I like the idea of this "environmental portrait" a lot .. it tells us who she is and that counts for a lot. I do wish the eyes were a little sharper and brighter and the background was less of both.