So I downloaded the track, and it sounds amazing on my brand new IEMs. I agree with foolomon, maybe the piano could use a little bit more reverb, but I really think that sample fits perfect. The mix is great, those drums mixed with the fast strings creates an awesome feeling. If I could change one thing it would be to bring that synth up in the mix a little… 
Can’t wait to hear it with the vocal, that should polish it off nicely 
Awesome job as usual!