I have had my bibs for two seasons - I do love them, and have had only minor issues overall.
I bought them in a large, am 145lbs and 5'7" tall. I have wide shoulders and thicker thighs.
The bibs hold up well to the variable snow we experience on Vancouver Island and they block out the chill from the wind super well. I have had no issue when with the waterproofing, even when I clean them at the end of each season.
The bibs come up nice and high, so I never get snow down my pants when I crash, and they fit pretty well. The large have just enough room to move around comfortably and wear a layer or two underneath.
I overheat in-bounds, and even more on the skin track! I frequently unzip my butt flap to vent, but one side of the two-way zipper has become pretty permanently stuck, so it hasn't been the most durable zipper. I take issue with the thigh vent zips on the inside thigh - when open, they catch each other when I skin up (no thigh gap here!) and have been wearing on the seams of my base layers pretty badly. I wish they were on the outside like the mens version!
The only other issue I have is that the straps wont stay where I adjust them. The plastic wont hold, even with the rubberized backing on the straps. I've taken to putting a large safety pin in each to stop it from moving through the plastic slide adjustor.
Overall, I really do love them and get great use out of them! There are just some smaller things that I will be more attentive to when it comes time to replace them!