I got my L bib from Aerotech yesterday and wore it around the house for a bit. It did make me feel like I was going to be lifted to the ceiling by my crotch, and the straps were a little uncomfortable on my shoulders, but a leisurely 10-mile test ride today went very nicely. I could feel them on my shoulders but they pretty well disappeared everywhere else.

I'm 6'1", 215, 35 waist.