For starters I'm 6' and weight 160lbs, I ordered a medium and it fits great, its a good snug fit, not like a skin suit second skin but you dont want bibs to be loose, so these fit me just right. With that said I really like the Kiss chamois, Ive had a few Castelli bibs that used that chamois and never had an issue with it. The overall feel, fit and finish were fine, no issues but ive only had them for a few weeks so their durability cant really be reviewed yet. I find the leg grippers to be excellent, Ive gone through a few different brands and most would slide up while riding but these have stayed in place like they were glued.
I was in the market for a bib short that would be comfortable on rides of 2 hours or more and I found them in these. They do run a bit tight which I found to not be a bad thing as your muscles will require extra support that compression provides. I wear a medium and didnt find them uncomfortable at all. The support they give to my lower back is perfect. The build quality is perfect and worth every penny youll pay. YOU SHOULD size upwards if you want a more relaxed fit. As always Bike Tires Direct provides great product and service. Thanks