This jersey is an amazing value. I own over 20 different cycling jersies (inclucing the Gore Xenon 2.0 Jersey which costs twice as much), and this one is my hands-down favorite for warm-weather riding.
Why? AWESOME ventilation. Mesh panels are perfectly placed - this jersey stays dry and airy even when temps soar above 100 degrees here in the Sierra Foothills. I am a high-sweat-rate rider, and in over 30 years of competitive riding, I have never had anything that transports moisture so well.
Other benefits of note:
Pockets are well placed, and there are no silly, unserviceable zippered compartments that require two hands to open while on the bike or to harbor mold on the washline.
I LOVE the collar that tapers down to the neck zipper. Pros tend to wear high-collared jersies, but that is because that collar is billboard space for sponsors. I own several high-collared jersies for cold-weather use, but unless you ride around with the jersey zipped all the way up in the summer, that extra collar is going to just flap around in the wind and chafe or annoy.
Only caveat: this jersey breathes so well , that when climbing in hot & dry conditions with little wind, you may find yourself pouring water down your back for additional cooling. This is a tradeoff I'm willing to take for a jersey that never leaves you with a clammy belly on long descents.
Note on sizing: this is a RACE fit, aerodynamic jersey. For European standards, it actually runs rather large. I'm a wiry 6'1" 155lb, 40" chest & a Gore's medium fits me perfectly (I'm an XL in most Italian jersies, and a M/L in American brands like Pear Izumi). If you want a baggy / loose fit, look elsewhere.