I have only used the board for an afternoon but... a very, very, nice ride. The best edge hold, quickest turning and most agile board I've ridden. I'm going to hurt myself on this board as I felt very confident on all the conditions I road on (from N.E. powder to almost ice). I had to decrease how much I effort I put in as (again) the board turns very easily. FWIW, I like carving & quick turns verses top to bottom speed runs.
I spent the morning on my other board ('03 Salomon Prospect) which I like and does a good job of what I ask. Also last year I rode a NS Legacy which although the 'right' board for my style of riding, and performed really well, it was too stiff for my likes. For me (160lbs) the SL-R (158)is easily better then either.