I have had a few opportunities to use the Gore Power 2.0 bibs. I find them to be very comfortable and well constructed. I usually ride 25-35 miles and think the chamois works well for that distance. They are light weight and seem to breathe well on warm days. Construction is good as well. I am 58 160# and found the medium size to be appropriate. I do have smaller legs and waist, so the Gore bibs with a more of a European cut fit me well.
I would buy them again.