It's always a fun time when the Gorillaz release a new CD, mostly because you can be sure of at least 1 or 2 fantastic songs. D-Sides isn't a core release for the band, it consists only of B-sides, rare tracks (both on cd1) and remixes (cd2), BUT that doesn't mean you should ignore this album.
I'll start with CD2. It isn't great to be honest, none of the remixes are as good as the original tracks and the CD as a whole is likely to be left in the case once you've played it a couple of times.
However, CD1 is brilliant. The highlight is the very last track, Stop the Dams, which reminds me a lot of Blur in their latter days. Some tracks are painful to listen to (Murdoch is God) but on the whole, this is a great purchase if you have other Gorillaz CD's.
If you're not a fan of the band then you won't find anything here that will convert you to the cause but I think Stop the Dams has a more universal appeal which might well be worth a digital one-song purchase.