Got this piece on SAC about a year ago and it has been my go to warm weather top since. I've used it for just about everything; indoor climbing, trail running, trekking, road cycling. The fabric is light and stretchy, allowing totally unencumbered range of movement when climbing. It breathes well, keeps you dry and cool, protects against UV, and rather surprisingly manages to smell reasonably clean after some abuse. I've put it through a hard year of use, and there are only a few small tears that are more a reflection of misuse than lack of workmanship. Overall, a great buy from a good company that consistently offers reasonably priced alternatives.
Also - I'm 5'11", 170 lb and a medium fit like a charm!