Meh – about half their stuff is decent enough as light pop, while the rest blows. It depends on how much acid they were on at the time. That was the problem with bands of that time – they were so strung out most of the time that “live” performances were almost unintelligible. The worst of the lot for that was Led Zepplin. Never get a LZ live album… you’re just wasting your money. At least when they were in the studio, the label lackeys were able to keep them clean enough that they could remember the lyrics and play their instruments.