Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: what is this, a bootleg?

If Yes is going to release an old concert from Philly, why pick one that's such poor recording? Why not release the live in Philly show from the Big Generator tour? That show has a lot more songs and is a lot better sound and picture quality. Why not release that concert from the Union tour that they kept showing clips from on the YesYears video? They could have picked a better concert than this 1979 to release. What about the Keys To Ascension show? Even if you're a big Yes fan, you should skip Live In Philadelphia 1979 because it's a big disappointment. Send the band some e-mails and tell them to release videos from the Big Generator and Union tours because they obviously filmed some of those concerts.