Hi.
The Good:
-Aw man yeah, gotta love that piano and synth combo in the smooth jazz.
-Melodic content is excellent.
-Your instruments are good. I'm curious, what is that lead synth that you use all the time? It reminds me of stuff from Omnisphere, but I haven't found it. ...unless, of course, you made it, in which case it looks like I have some sound design to do because it sounds awesome and the filters on it are excellent.
-Solid mixing for almost the entire thing, just a few complaints I have.
The Not-So-Good: Oh, you want me to list ALL of the flaws, do you? Right, you asked for it. No mercy shall be given, I'm going to nitpick the hell out of this.
-Okay, right away those drums see a bit too strong for something laid-back. Would be nice if there were some kind of introduction aside from instant "thump".
-The background chords get really buried very quickly under the piano and synth combo.
-The drums start getting really repetitive when they've not changed for an entire two and a half minutes. The same 'break' all the time is a bit boring if it can even be called a break. Plz. The bassline also stays the same for a lot of the piece as well, really kinda boring.
-Such mud at 3 minutes in. Right around there things start getting stressed in the mix due to the kick. Also, the piano doesn't seem like the velocity changed much at all - it sounds as if it's being played at the same volume as before.
-Not sure I like the filter on the drums at 3:20, it seems kinda unnecessary.
-Your bass is a lot more unclean at around 2:40, things are pretty muddy between it and the kick and the piano notes all together. Also, the bass in the piano panned to the left is slightly off-putting.
-The final ending is a bit awkward for three reasons. First, the way the drums go out is a bit awkward, it sounds like a loop just ended rather than the drums actually completing. If you had faded out the volume a bit more entirely rather than just lowpassing it this could have worked. Second, the bass is wobbling a lot in there compared to the other places - the only thing I can of as a result from this is mixing error or it was covered up earlier. Finally, it just sits there on something that sounds like it should continue but doesn't.
Overall: Score of 9/10. K, so, you asked for all that feedback and I went full nitpick on you. That said, this is still excellent. The biggest problem in my opinion is the drumline - that needs a LOT of improvement in realism and in overall mixing/transitioning of them.