I took these out on demo @ Vail yesterday. It had been 3 days since fresh powder so the back bowls were a little cruddy with chewed up bumps. These suckers cut through them with style and felt smooth as butter. Don't even mention the black groomers...HANG ON TO YOUR BREATH! At 40 MPH + they remained super stable and FAST! Put them into the powder bumps and they'll tear it up too. The only weak spot would be the tight bumps...but I like to avoid those anyhow. They provided the best skiing experience in 25 years. I happened to be skiing with a 25 year Vail ski instructor all day who was using the same ski. His comments were identical. FUN FUN FUN. I am 6'1" 205 lb and used the 170s. They held just fine and felt like I was skiing a 195.