I've only tried three different brands of bibs: Bellwether, Cannondale and Falconi, and none have caused me any issues. I'm an enthusiastic shorts-to-bibs convert. As far as relieving oneself is concerned, there are some brands/models that are scooped a little lower in front, which makes it easier, though I don't know if that's intentional, or an accident of sizing. Try a few different ones on and see.