Andrew C.wrote a review of Mammut Stoney Pant - Men's on February 5, 2013
Familiarity: I've put it through the wringer
I bought these a couple of years ago. I'm about 5'10", 180lbs (reasonably athletic, with fairly chunky legs) and bought the Large.
I've taken these on trips to NZ, Canada and several trips to Europe, and they're as good as the day I bought them
The fit is awesome, the fabric is fantastic (waterproof, durable, a bit of stretch, and just enough warmth).
I HATE overheating and didn't want the bulk of a fully insulated pant. These are perfect. I've skied on really cold days in Whistler, Zermatt and Chamonix in these things, and I'm completely comfortable with a single pair of merino thermals underneath.
When I warm up, I make liberal use of the side vents (which helpfully have a mesh backing, so you can keep skiing even in pretty deep snow without worrying about them filling up your pants).
Pockets are great as well - two pairs on each side plus back pockets. The top and back pockets have waterproof zippers, but the main ones I use are the side pockets which have the flaps over them. I keep energy bars, lip balm, trail maps, leatherman, whatever I need in there, and completely forget it's there while I'm skiing.
This pair of pants really won me over to the Mammut brand. I've since bought the Stoney jacket to go with the pants - the only drawback I had was that the pants and jacket are meant to clip in to one another to keep snow out, but the clip-in system had changed by the time I bought my jacket (2009 pants, 2010/11 jacket), so they're not really compatible.
Aside from that, highly, highly, highly recommend either as standalone pieces.
For me, these are the perfect ski pants.