Sure the documentary is mildly interesting, but the whole package is very poor, although as the title is Yesspeak, I guess it does what it says on the box, but don't buy it for the music. The sound, though is what really lets it down. Even in DTS mode the rear speakers offer nothing, but what's worse, neither does the center speaker. Even Roger Daltrey's commentary hardly sounds from the center speaker making viewing particularly anoying if you have your front speakers spread apart. The music only section again is poorly mixed, and again any suround sound is non existant, I expected the music to be mixed in five separate channels, not two, with a bit of reverb in the rears. Overall, I find the whole thing unwatchable, and disapointing, although It might just be worth for the Rick Wakeman section.