I have the long sleeve which you can actually take out the sleeves and end up with a Jersey, normal sleeve length. I use it from about 25F to about 44F. In the 20's and 30's F I use it with a base layer and a mid layer, with temps above 40 or in the 40's I used it only with a base layer, and it works Perfect! I've used in conjunction with the Castelli Sorpasso Bib Tights and its perfect!
I just finished the Rapha/Strava 500Km Challenge in December, I could not have had better gear!
I've put them in the washing machine, under delicates, not too much detergent and washed them about 10 times, everything looks brand new.
I'm 6'0, 174lbs and I have an XL size, I could have worn a Large, but then limit myself to only one layer. XL allowed me to be able to wear two layers underneath.