I won't say anything about the music on these discs, which other reviewers cover admirably, but this is a word of warning.
These are not standard Audio CDs. They are Copy-Controlled, which means that they will not even *play* on (most?) computers without installing their own dire player, and you won't be able to listen to them on an MP3 player.
If you only ever plan to listen to these CDs on an ordinary hi-fi, you can safely ignore this. Otherwise, I'm afraid you'll have to buy the individual albums, which have not (yet?) suffered from this outburst of idiocy.