The Ozzman
Melted by feels
Just looked that up. Actually a pretty good set in terms of giving a good sense of what they've done and giving you their best songs, although for some reason it includes half of the war within.
Speaking of which...greatest hits sets suck. I prefer buying a live album if I want to see what i should get by a band, because then if I end up getting other stuff by them it won't be redundant.
They suck unless you just want a nice overview of the band's work. I have a two disc greatest hits of Cream and it's really all I need (even though I plan on buying the full lengths later since there are only 4 of them)