I enjoy the melodic take on this track. I honestly feel that if it was going to be a rap track you might need a higher BPM. At the rate now, I feel this is more of some type of chillout music.
at 0:20 there is a synth that comes in which makes it stray farther away from a rap track in my opinion. It gives off an electronic vibe that you don't hear in many serious rap tracks. Also, at 1:37 that same synth hits a note that is off key, and you can tell.
My next complaint is that during the break, at 0:45 i feel like you could change up the drums a bit so its not so repetitive. Just a small beat change can grab interest from anyone thats listening.
Other than those things. Still a solid track. And when you add lyrics it makes a huge difference. So I could see this becoming great.