Chilltrax seems to be staying away from anything remotely smooth jazz sounding. They're big on playing the "core artists" of chillout like Thievery Corporation, Zero 7, Groove Armada, Moby, and yes, Massive Attack. As Majaman points out you do hear them get a little experimental at times, but they always bring you back to a song with more traditional structure pretty quickly, and many times it's by one of the core artists. I'm liking it more and more...and for a station without jocks, it's got quite a bit of personality thanks to some wacky imaging. They're not taking themselves too seriously.