Funny you should ask! I just got my first pair and rode with them yesterday for ~30 miles.
The comfort was fantastic: no elastic waistband, the straps were fine, and since I didn't have the double-stomach pooch thing going on, I felt really sleek. Rawr!
When I stopped for a bathroom break, tho, I realized that I had to get my jersey off in order to disrobe below. So off comes the helmet, the glasses, the gloves, unzipped the jersey and peeled it off, only to have everything that was in my back pockets (snacks, keys, routemap, etc) scatter all over the restroom floor. At that point, I'm a little weirded out that I'm in a park's restroom stall dressed in basically nothing but a sport's bra. Hrm.
So my overall rating: A- and try not to have to pee ever.
-- gnat!