Very, very good.
Most definitely deserves a ten out of ten, five out of five. This seriously sounds like professionally made, publishable material. You have a great voice for singing, no doubt about it, and this is some of the best piano/classical music I have heard in awhile. The only thing I would have to offer is that you find some way to boost the gain on your microphone a little bit, as it is a tad hard to hear over the piano.