Got these of BT. I'm 5'10" and 165 lbs with a 32" waist and ride a lot. I got the Large which generally fits well and holds you in all the right places. The chamois is top notch and the lycra and stitching all seem good to go. My only hesistation is the lower leg band (in white) which is a tad tight to start out with but loosens up a bit over time.
All in all I rate them higher than the Castelli bibs I've had, but a half notch below Assos and Rapha but at the same time they're a good bit less expensive if you score them on BT.