I couldn't agree more, most definitely in my top 5 and far better than when I did eventually see Ozzy on his Blizzard of OZ tour. I have never seen a band before or since turn a hostile crowd around like that. I have the recording and they have overdubbed the f*** off Slade chants with cheers...
I saw Slade at Reading in 1980 when they were the very much unwanted replacement for Ozzy Osborne. It took them less than 2 songs to turn around a very hostile crowd, absolutely magic live.