Although all the maps are sound, my favorite by far was Megalomania, and my least favorite- by far- was Hollow Void. But anyway.
None of the maps have even small nitpicks, other than one or two places where the 0.5x0.5 WU water light texture was on small raised portions of the floor, and, in the middle of a netgame, I thought they were teleporters. Ah well.
Good stuff, here.