jay_pwrote a review of Arc'teryx Covert Cardigan Full-Zip Sweater - Men's on November 30, 2009
I'm 5'11", 190 lbs and the L fits great. It has more of an athletic fit than say TNF Denali, which I think is rather sloppy. It isn't as warm as the Denali, because it uses a lighter weight weight fleece.
It does pile after minimal wear, however, the piling is finer than traditional fleece. I actually bought a "fabric shaver" and found that it looks as good as new once you run over it a couple of times.