This is easily the most comfortable pack I've ever had - but then everyone agrees on this about Arc'teryx packs (okay maybe not everyone but I'd say most who've tried them). I carry more than 40 pounds regulars for 5-9 hours and can hardly feel it - certainly no back aches or should pain.
This is my first Arc'teryx pack after Deuter Futura and some other packs - thanks to Backcountry gear expert.
The roll top allows you to pile your gears in and if you want to take just your camera or water bottle out in the middle of a hike, you can simply use the full sized side zip - I couldn't believe how much easier it was in the freezing rain yesterday. :) I would venture to say that I'd stay with Arc'teryx although it's more expensive: worth the price.
The of course the pack is made of really tough material and the zippers look sturdy.
Miura is not supposed to be a winter pack (they've got Silo for that - which I'm still consider buying for next winter) but I was able to use the front straps for my snowshoes and I clipped a couple of small 'biners to the gear loops and put my crampons there. I'm pretty sure you can carry your skis and snow board too with a bit imagination. But of course Arc'teryx has the silo line for winter but I want the "big" load size as I've got tons of stuff for me and the dogs including ropes (one of my Dobe got herself into a tree hole of 8-feet plus deep and required rope and pulley) so I got Miura first.
If you want a solid, comfortable pack and one that is easily accessible without having to take all your stuff out to get to that water bottle, get this! :)