i just got a 159 stairmaster, and its amazing. nice and flexy, but not toooo soft, perfect flex id say, sooooo poppy. and its effing cheap. got here fast too. took like a week or something.
all i ride is park, and this board is everything you could ask for and more. it has like a super tough base material too, i shred the base of my board super fast, but this ones stood up soooo well, only like one big scratch on it, and its not even bad. and its still relatively fast.
only one thing i can think of that i dont like about it, is the top sheet is a little delicate around the edges, its one of the top sheets that will peel up fairly easily, so ill see how it stands up, but so far so good.