I've had 171 and 181 double times, 184 new lifes.
The 171 double times are now my backup skis, rode them hard, and they are missing a LOT of edge, they have a groove into the base from rails. No problems here.
My 181 double times are still my park skis. Have some edge left but not a lot, still fun skis just STIFF. Funny thing with these is that i caught a tip going onto a box, and the topsheetpulled back like 8 inches long and a inch wide. It was funny skiing around with it curled up. I glued it back down and its been unnoticeable since then.
The 184 new life were super fun, i really enjoyed them, rode them all the time, even in the park and they were great. Except that I tore the bindings out. Remounted them and tore them out again. AAAANNNND remounted and tore them out again. Thats 3 times, kinda sucks. I'm an aggressive skier but am not a big guy (5"8 145 pounds) just don't really know what happened with them.
But i've never snapped any!