The 166 was designed around the owner of SnoPlanks. He happens to be right about my height, weight, and boot size. I'd say James (Goodride) is in between the 159 and 166, perhaps leading to the funky experience. This board is very sensitive to setup. At 19.5 stance with front and rear bindings set inward in the insets, 24+ 6- for me it's perfection in all conditions. I can't ride this thing to it's potential with rear binding positive. I also can't ride it wider stance, it absolutely ruins the board for me if I move my front foot forward on the forward inset. But at as narrow as it can go, with a little negative on the back, the asym heelside turns suddenly become magic. Front side bottom turns, more magic. Rides very small for a 166, turn initiation is very fast with size 12 boot. With Now bindings, this board likes the soft bushings best, or maybe it's just me.