hey dudes, know what u mean, i too have been scouring the earth looking for feedback on GNU Danny Kass boards, but not much luck
anyway Sierra snowboard shop gave me this reply in another forum which im sure will help you choice
"Actually, Danny Kass' boards are great all mountain freestyly boards (as are most pipe boards) because they end up having great flexes that are a bit stiffer than average for a freestyle board which makes them great for all mountain riding, but also are some sort of twin shape, making them fun for the freestyle. I'd say that the Vertigo is definitely a great choice."
good luck with your choice and enjoy the ride
peace out from zagreb croatia