I bought two of these - one black and one in white. The black is made with coldblack technology and is supposed to be cooler to touch than standard black fabrics. I tested this out on two rides that were on days upwards of 95 degrees. The coldblack really works. I did an unscientific test, though, placing a meat thermometer underneath the fabrics after laying them out in the sun and the white was a few degrees cooler. But, you will look way awesomer in the black kit and intimidate your rivals because you are brave enough to wear black.
The mesh on the back is outstanding. As soon as you develop a little bit of sweat and have the least bit of airflow, the ventilation is very noticeable. The jersey makes it feel like you're riding in weather 10 degrees cooler.
The rear pockets are deeper than most jerseys and your items will sit lower on your back than other jerseys. It felt a little weird at first.
The fit is definitely made for a slim build. I am 5'11", 147 lbs, 38"chest, 31" waist, no excess belly. The medium fit perfectly. Usually, my jerseys either have 4 inches of extra material in the chest area, or the jersey is too short. The front is nicely scalloped so it does not bunch up when you are in position on the bike. However, when standing upright, it will look like it's too short in the front.
The texture of the fabric is outstanding and it is comfortable enough to wear as a shirt. This is usually not the case with me for most synthetic materials. After a race, I don't change out of the jersey because it breathes and wicks so well that it aids in cool-down by keeping it on.
If you ride more than once a week, you'll definitely want to get more than one kit because you will not want to wear anything else.