Purchased the chartreuse vest, not so much for the wind protection, but for visibility when riding on rural roads here in the desert. I've noticed that traffic now gives me plenty of room when they pass. Only drawback is that the cool graphics on my new jerseys are hidden by the vest. Oh well, I'd rather be safe to ride another day.
The vest will ride up a wee bit in the rear if you have your jersey pockets stuffed with the normal things, like a spare tube, identification, house keys, camera, nutrition, etc. Doesn't ride up too much.