Not that the first two Hawkwind albums are horrible or anything, but here, on the third album, one could make the argument that they arrived as a force to be reckoned with, from a number of perspectives. With the additions of Lemmy Kilmister and Simon King to the lineup, they finally gained a modicum of stability in the all-important rhythm section. The material is still driving, mantric space rock, but much more to the point than the brain-numbing, sprawling jams of previous efforts - yes, even the epic-length "Brainstorm". In fact, this is the group at their prime, trance-groove best, IMHO - at least when it comes to a studio recording - and reissues include singles like "Urban Guerrilla" and the 50's derived sludge-swing of "Brain Box Pollution". Not to be missed.