Fit is great, I'm 6'4 and both the large and Xl were plenty long. Large was tight in the chest (I'm a 43" chest), and Xl was perfect. I was very impressed with the smooth transition between lg and xl sizes, xl had exactly the extra room I needed without adding a bunch of bulk to the cut. 5 stars on fit.
Features on the vest were well thought out, I like the smooth lightweight mesh they chose for the pockets, it keeps them from being bulky and you don't notice them there until you need them. collar is a little bit bulky and extends super high. This would be very useful for blocking wind and you can tuck your cin slightly to block all windflow over neck.
The material on this vest is unique and i'm not so sure about it's utility. It is as soft as a microfleece but has no loft. I was expecting something more along the lines of polartech powerstretch with a smooth side and a lofty side but this material is the same tightwoven (tighter than powerstretch) soft stretchy stuff on both sides. Compared to powerstretch this material is slightly heavier (260 g/m�) yet not as warm as it has no loft, it is much more stretchy and blocks wind better than powerstretch while still being breathable.
These are only initial impressions, I deducted one star due to warmth/weight ratio of material.