DGwrote a review of Castelli Gabba 3 Jersey - Men's on March 5, 2018
Familiarity: I've used it once or twice and have initial impressions
I've been aware of the jersey for a few years, but the price has been discouraging; that said, it's worth the price in terms of comfort in challenging conditions. First test was in gusty winds in 15-18C/60-65F. With a light base layer, I could ride happily without arm warmers, and even though at times I was wet with perspiration, it did a good job of keeping the moisture under control and I didn't feel clammy or soaked. Definitely a race cut -- a little tight up top with a 39-40" chest, but just right with 31-32" waist.
If you ride with wired headphones routed inside your jersey, you'll want a cable extension because the butt flap requires a longer than standard cable length to reach out and up into the jersey pocket.
Great little detail: the collar has a notch in the center, so it doesn't chafe the back of your neck when rolling in the drops.