If, like me, you have been following these guys from very early on, and had downloaded most of these tracks for free a few years ago, and thought that you didnt need to buy the album. you were wrong. i thought this, then i had some spare cash and decided to buy the album, to listen to the songs i hadn't already heard. I was astounded, not only by the quality of the new tracks, (one more(or ten) being now one of my favorite songs)but also the way the older songs have been updated.
For example submarine now is much longer with some extra lyics added on to the end. Mzungu, previously i thought of as an average song, is now much quicker and lively and has hence become a favorite of mine.
the only problem is some songs have been ommitted from the album (i don't know why) like lets get wasted, a truly awesome song, and cocaine kate. there are others missing, but these are the ones that i thought really deserved to be on the album.
Finally the recording quality is much better than the older versions and the whole album sound is more polished. If you were like me and thought you didn't need to buy the album because you already had most of the songs, buy the album. If you like ska, buy the album. just generally buy the album, it is awesome.