I have the 09/10 JO pros. the one with his girlfriend on them (white ones) I skiied k2 disorderly for 2 years and just swapped to the JO pros. I got them for 399.99 with Head mojo 12s. So far, I absolutely love them. They are super light, snappy and they are a mid stiff ski compared to my k2s as they were a more soft ski.
Previously I have been more of a rail skier then a jumper but after getting these skis. I found myself hitting jumps more and slowly getting back into them. So they are solid on jumps, i havent hit anything more then 35 feet this year but il be testing them on 40+ this week.
On rails, nothing negative to say so far Pretty solid ski, the sidewalls feel a bit weak but they haven't failed me yet, i hit alot of rails and boxes so im hoping they will stay strong. Nice low swing weight makes it easy to spin on and off. They get the job done
This thing rips groomers, I cant wait to take it onto a bigger mountain. Never gets chatty at fast speeds, super sick for carving. Rips switch too, im use to a symmetrical ski, but i found no trouble with this one.
Overall, if you can get the chance. get the JO pros. Marker griffons, STH 12s, 14s, 16s, fks/pivots or head mojos would be perfect on these. This is all from 5 days of full east coast skiing so far so take that with my advice.