Corrywrote a review of Louis Garneau Course Superleggera 2 Jersey - Men's on June 25, 2016
Familiarity: I've used it several times
This review is of the superleggera course (I think the previous model), though they look identical.
This is an incredibly lightweight and breathable jersey. It is made with a combination of very thin almost silky material and mesh, but still protects well from the sun. The collar is thinner and the sleeves are a bit longer than traditional jerseys. And the sleeves are tight without cutting off circulation (I don't notice them when I'm riding); it's really the ideal sleeve in my opinion. The zipper tucks under a small fold in the collar that holds it in place. I like that the collar is not too tight in the neck. The mesh in the shoulders and upper back keep me cool(ish) on climbs. It is a racer cut, so tight fitting and aero. It is definitely a top-of-the-line summer/climbing jersey.
The two side rear pockets are angled, meaning you can't quite stuff as much food in them as traditional squared-off pockets, but they are easy to get into and I can still fit my iPhone 6 in the side pocket on one side and several gels and kashi bars in the other.
This has moved up to being my favorite jersey in the closet.