I can't say I wasn't warned.  I read all the reviews detailing the poor sound, poor picture, short length, etc. etc.  And then I bought it anyway.  My excuse is that I'm a lifelong proghead and at the time this was recorded in 1979, Yes was my favorite band.  The classic lineup was about to fold, with Wakeman and Anderson gone by the next year's Drama tour.  So this was a rare glimpse at one of the last shows of the 70's by the classic lineup of one of prog's greatest bands.  And besides, performances like this are all too rare.  Try finding actual 70's concerts on DVD by Genesis, King Crimson and others and suddenly this one looks more attractive.  My DVD of ELP's Pictures at an Exhibition was wearing out too.