I could be pedantic and ask "What on Earth is 808 State's track 'Pacific' doing on a Chilled 1991-2008 album when it was produced in 1989?" But I'm not going to be, because I love that particular track and am eternally grateful for its inclusion.
This is a very good collection of tunes, although the reason I give 4 stars instead of 5 is because there are a good number of tracks that I wouldn't personally regard as "chilled".
Nonetheless, there were a few standout tracks for me. I've already mentioned 808 State, but there are also great tunes from Cicada, Alan Braxe & Fred Falke, Air, Zero 7, and Groove Armada. However, that is as good as it gets if you, like me, are seeking a true chillout collection. If you are looking for that, I would strongly recommend the 'Pure Moods' compilation. Overall this is still a good album, but it could be better.