Though $30 more than previous years Mille bibs, these are definitely better built. The X-Frame straps are cooler on warm rides, the chamois is a tad wider which helped me, the leg grippers are much better than the old school silicone bands, and lastly the junk cradle is a bit better. I have done several 4-6hr rides in these and really just forgot about them where in the past I would have to readjust the chamois to get the seams off my sit bone. I use these for endurance MTB and I have used Pearl Izumi, Giordana, Jakroo, Bioracer bibs as a comparison.
Some changes to the straps I was not sure of. After a few rides, don't notice a difference between these a few older pairs of S5 Mille. They make great stuff and the best sign is you don't think about the bibs when you are riding, you just ride. Would buy again, and these guys get things out quick and keep you informed.
From day one I have never thought about them. Zero hot spots. I'm riding 6 days a week on a trainer or outside. Max trainer sessions of 4 hours. I do use shammy cream. Can't speak for the other models but these took a few weeks for my tummy to get used to. There was a little chaffing from the upper seam across the waistline. All good now though! Bought size medium. 5' 10'" 160#
