Excellent and warm
I don't really know if it gets better than this as far as bib tights go. I'm 6'1", 185 with a 32" waist and a 32.75" inseam and L fits awesomely. If you have longer legs, it may be worth your while to size up, but they work for my relatively short legs.
The material is soft, breathable, and warm enough to deal with late fall riding in Minneapolis. The chamois is probably the best one I've ever tried--now that I've ridden this, I'm a bit bummed that I don't have any Castelli bibs for the summer.
My one qualm with these is the transition of the interior brushed fabric from black to red. The effect is very cool around the knees; not so much around the crotch. If things move around in a certain way, you end up with your dong outlined nicely in red. It's not really an issue unless you forget about it and start walking around, although this feature could be a plus to the Mario Cipollini's of the world.