have heard garnier play some marathon 8 hour sets back at club uk a few years back, He played some great music, and a real variety so fair play to him....and he played spme fairly brutal techno as well as mellower sounds.
He has also produced some fine stuff sand wether you are into the style or not I think a track like man with the red face is a such brilliantly produced record, which should be respected even if it's not your bag.
maybe he's not 'underground' enough for some people but at the end of the day he has made and plays some good music, and that's what it's all about.