Good!

I found this to be a highly enjoyable abrupt piece of music - It wouldn't be out of place under some sort of commercial/theme song guise. The entrances/exits are a tad bothersome, though; fairly sudden and unsuspected. Near the end when the low-frequency hums came back in, a cymbal was used to signify the entrance which I felt worked pretty well; That should've been used all over this song.