ianforkeswrote a review of Mammut Trion Pro 35+7L Backpack on April 17, 2017
Familiarity: I've put it through the wringer
Halfway through this Sierra winter season and this pack has ticked (nearly) all the boxes in what I could need hauling my junk through the backcountry. I'll just bullet point a few key bonus points from my backcountry snowboarder POV.
Organization: huge open back panel means easy access to a puffy, water, extra gloves on the climb. When I take my helmet out and put my jacket on up top the whole thing clamps down to a nice, rideable pack. The dedicated shovel/probe (and maybe crampons if you pack it right) pocket means quick access to the safety stuff without soaking your dry goods.
Lid: I keep it on for big days and take it off for quick laps. The rope carry feature works well for attaching a jacket on the hike.
Outer carry: I can pop on telescoping poles and an axe on the back loops and latches easy and still ride no problem.
Ski carry:(Bummer alert) Is just that, ski carry. I like carrying my board split up in an A frame style most of the time. The beefed up side loops are built for skis and barely just take in the board and the clips. In a pinch when I don't want to fuss with it I'll just use the two compression straps on each side and a ski strap up top for quick board carry. In a real pickle when you need to hike back up and are unable to split the board a rear board carry would be prime time. So it goes.
Carry: I've loaded up to the (over the) max for a long hut trip. Not planning on doing that again, but my legs gave out before my shoulders did.
Looking forward to stripping it down and seeing what it does for climbing season this summer and fall.