Nice jersey for cool-cold weather riding. I have used it a couple times now with pearl izumi no sleeve trasfer base layer in 40-50F degree weather instead of taking a normal jersey and ight wind shell. Add some arm warmers and it works great in anything below 50F - not to warm for me. Optimal for me in this jersey w light base layer is 40-45F, still good from 45-52F, need to let down neck zip from low 50-high 50's. At 60, you can still wear it, but it does feel a bit warmish depending on your effort. Fit is comfortable with nice fleece-like interior.
-Wind protection is way better than my lightweight shell and you dont have to deal with flapping in the wind or a huge lump in your jersey back pocket. + you dont have to carry an annoying shell in your jersey pocket .
-Fit is snug, but stretchy.
-price - but nor really...how much did you pay for a jersey + wind vest?
Note on sizing. I'm 5'10", 150lbs average build. I usually wear a small in Capo tops and meduim in Castelli tops. i should note that i like to wear my jersey's snug and i have a short torso. I initlally ordered the Medium, which was fine but a little looser than perfect for me. I was going to keep it, but then i tried the small. I think small fit me better. Maybe because the stretchy material.
Have only had it in light rain and it performed well.