Sorry to hear you had a bad studio experience but it's something we all can relate to on this board I'm sure ! I thought the overall sound was decent though if this is a finished mix, I might have done things a little differently. But everyone has different taste and hears things differently.
I thought the singing was fine and the overall sound was together. I agree with Don about the feel - the tune is jazzy and it just didn't swing . IF your band is doing covers, which is usually what I do in my band, then staying true to the original arrangement and sound is what you're being paid to do. To that end, the singer needs to learn all the lyrics to the song and you changed the ending to the song, which might not appeal to an audience wanting to hear a cover of the original. But then agan, it's YOUR interpretation of the song, so you have to decide if that's important to you or not.
I had to smile a little when I saw your post because I have been putting together another band [ yes another one] during the past couple of months and we also cover that song. So I thought I would put it up for you to hear [ and just to annoy Don, whom I love, because he doesn't care for the song , LOL }
This is a rehearsal done in my basement in December - recorded live on my Edirol [ yes I know the bass is a little low in the mix ] - but this was done as a reference, not a demo. The bassist is singing on this one. I'm using Roland e-drums thru the P A.
Maybe some will like it, maybe not. www.drumminfool.com/recent/moondance.mp3