|Greetings from one of your own
Composition - There are many good repetition photo candidates in this photo. I think choosing one aspect of the piano and not the whole thing would've been a more fruitful venture. The angle of this photo reminds me of a catalog shot, which isn't bad if you were selling it. This has the makings of some very good perspective type shots, like pseudo-abstracts or something along those lines. Even not so abstract with photos taken along its length. This 3/4 angle perspective has really flattened this subject. The lighting isn't helping that either.
Technical - Speaking of lighting, I think that being a little less liberal with the exposure and shortening the shutter would've provided a little richer tones. The overall colors of this aren't bad by any means. I think darkening the photo a bit would definitely make them a little warmer. Dropping the ISO down to 100 or lower (if possible) would've also helped the color saturation. At that shutter speed and Aperture, you definitely had room to do that without too much fear of camera shake unless you are recovering from a nasty heroin addiction or something :) My camera has a low end ISO of 64. I shoot about 0.01% of my pictures in an ISO above 64. It provides much better colors and there isn't much movement to speak of in this photo where a higher ISO would be recommended.
Overall - Not a bad subject, but a pretty bland shot. This subject has a lot of potential, but not from this angle nor this bright. I think you could've chosen one of the many repeating parts from this piano in lieu of the whole thing. It would've made for a more interesting shot. There's nothing really "wrong" with it, just not particularly appealing to the masses. 'nuff said. Good luck! - Bob