I really have no business reviewing dubstep, it's not something I listen to at all really. This is the first I've heard of "chillstep" though, and I must -- not bad. I like how your song isn't just a series of annoying sounds that make me think my speakers are picking up extraterrestrial interference. No, you clearly put care into crafting a very smooth and calming piece that sound great frankly, and that's why it stands out to me. I feel like most dubstep is just WUBWUBWUBWUB AYAYAYAYA WOWOWOW. I'm a fan or your version of dubstep. A very fitting title as well I might add. Makes me think of Final Fantasy XIII, and Metroid Prime to a lesser extant. While it sounds good, it does delve into the realm of being slightly generic at some points. That's my only real complaint though. Other than that, I think you did a fantastic job. 4/5.
Anyway, great song. I listened to it twice : )