I think there's some good ideas, but I also think it's incredibly monotonous for the first 2:40. There's no dynamics to it, and the melody isn't all that memorable until that 2:40 mark. I also didn't like the rap verse as it clashed with the sedate, ambient vibe of the first half of the song. I really did like the minute or so after the 2:40 mark, a nice little groove, but as someone who isn't a fan of dubstep in the slightest, I lost interest at that point.
Honestly, overall I don't think it was very good, certainly not downright awful, and obviously this is just my opinion.