I have a gore phantom II. I have only worn it twice. Problem for me is it gets me to warm even in 25 deg weather. I dont like to ride in weather that cold anyway. It does a great job when I'm initially warming up, good wind block material. BUT as soon as my core temp rises and I start sweating, its like an uncontrollable heat consumes my upper body making it uncomfortable. I unzip down the front a bit, unzip the arms a bit but then I get cold from the air hitting the sweat. I zip up the center leaving the arms unzipped a little which helps with ventiliation (and yes I have started rides with the armpits unzipped to ventilate) but I still get to warm. Then unzip....repeat...repeat...repeat. It got annoying. I dont even wear it.

PS....Its a black size small (I'm 5'10 175lbs) the arms seem to run a bit long on this model.