Sorry to be the lone dissenting vote, but I can't stand bibs when the temperature is over 80. The extra fabric in front and back simply adds another sweat-soaked layer. I put my bibs away when the weather warmed up and I probably won't use them again until late fall.

Honestly I don't find much difference in comfort - the only advantage I see is that with bibs I don't have to worry about a "gap" if my jersey isn't long enough.