No experience with that line, but I can say that I used to use a pair of Mountain Hardware Exposure II bibs for riding. They worked great for keeping me dry, but they weren't really cut to accommodate the movements of riding. I would expect the Burton bibs to be better cut cor the movements of snowboarding.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz