i bought the core version of this board for park riding, but i've been happy with it on the mountain, too, despite the fact that i bought it down 4 cm in size (i'm 5'11" 180 and the core only comes in 154) for jibbing. most of the flex is in the middle of the board, which is nice on rails, but the tip and tail are much more stiff, giving a lot of pop when weighted properly. the base has held up very well so far, and is relatively fast. i've had no problems landing bigger jumps on this and it feels good on rails and boxes. my riding has gotten better since i bought it.