I am impressed with the fell and performance of the fabric.  The most surprising thing is that the shirt provides an unexpected degree of wind resistance.  Running in a sustained wind I was quite comfortable in this shirt as the fabric did not allow the wind to cut through.  The fabric vents sweat and breaths well so the wind resistance was a surprising bonus.

Only down side is that the size medium is definitely not "Performance fit - close to the body" (direct quote from product description) as I would expect for this type of shirt.  I am noticing a clear trend over recent years that "medium" keeps getting bigger and bigger in all brands and types of clothing.  My 40" chest and 32" waist are supposed to be the universal medium.  I have some older (5+ years) Duofold brand t-shirts in medium that fit snugly.  I just got a new Duofold shirt at the same time as this Champion and both mediums fit similarly larger than previous ones.