I have yet to officially enter a race on Zwift. I've ridden with a few race groups for giggles, but got soured on the idea when nearly everyone in the group "magically" weighed 130 pounds. A local guy races A's on Zwift and has his height and weight set at 5'11" and 150 pounds even though he's 6'2" and hovering at 180 on a good day. It's entertaining to see him get dropped on fast group rides, but "podiuming" A races on Zwift.