Simply amazing.
This is a phenomenal game. The soundtrack is very impressive, love how you have artists I actually know as opposed to nameless DJs like certain rythym games *coughDDRcough*. Anyway, it seems like you've updated your interface since the original MFX (which, by the way, is excellent too) and it helps to improve the experience. It is a little difficult getting used to the scratch notes being on Shift instead of the spacebar, but other than that no gripes with the control. Amazing game, and I'm eagerly awaiting MFX 3 this summer.
Oh, and since you wanted some NG Audio Portal suggestions, I'd like to recommend Can't You See? by Quickbeam and Suck This by Xenogenocide.