Great arrangement, great performance and a very professional production. Great singer! Absolutely radio-ready.

The only critical note I have (and you asked for just that) is the quality of the vocal recording. The singing and the mixing both are great, but the microphone you used just isn't capable to pick up all the details. I seem to miss the rich tone I know that singer's got to have; she now sounds a bit flat. Had you used a better mic (even a Shure SM58 would perform better imo) there would be absolutely nothing, nothing at all to nitpick on this song. (you must have changed the pianopart pointed out earlier, 'cause I didn't hear a problem there)

I've listened through M-Audio DSM-1 monitors and Grado RS2 headphones.