I just started wearing the Mammut Kapin Pullover and the fit as great! I'm 5' 7" 125 lbs (pretty slim) and it hugs my torso well. The sleeves are long enough that it doesn't rise up when moving my arms. I'll be planning on using this between a base layer and an outer shell for somewhat chilly days.
This review was written in the old system and had content requirements that are different than reviews written today.