This is a great wind blocking jersey. The temperature for my morning commutes is generally around 40 degrees and this thing stops the wind from creeping in. My rides home are closer to 50-60 degrees and I would not recommend wearing this jersey above 60 degrees as it then feels like you're wrapped in plastics trying to cut weight for your fight tomorrow. All in all, a solid jersey.
I'm 5'11"/180 lbs and got the XL. The fit is not uncomfortably tight and the sleeves and length are a tad long which I don't mind at all.