Climbing Guywrote a review of Black Diamond Demon Duffel - 2565cu in on October 18, 2011
This is a good pack for its intended use -- hauling your rope & rack to the crags or air travel with your climbing gear.
It holds my 60m 10.2mm rope, full trad rack, shoes & harness. If I carry my rope in a separate rope bag, it holds a full rack, 2 pairs of shoes, 2 harnesses & 2 helmets, plus a little room to spare for lunch, etc.
I like the full length zipper so it's easy to reach anything packed in the back. It has a full length inner pocket for guide book, wallet, windbreaker, hat/gloves, etc. The pack cloth material seems pretty durable. The framesheet prevents your climbing gear from poking you in the back.
The rope tarp is big enough to comfortably flake your rope and keep it clean -- not like some 3 ft by 3 ft tarps I've seen.
I also like how the shoulder straps and hipbelt pack away (for checked luggage, etc.)
I probably wouldn't take this pack on any approach that is steep or is more than a mile or two. It doesn't have any compression straps and the load doesn't necessarily carry close to your back, so on steep terrain it will shift your center of gravity more than a technical climbing pack.
Also, the hipbelt isn't padded and there's no chest strap, so long carries with heavy loads would be less than ideal. Finally, no outer pockets, or water bottle pockets, although you probably could hook up some internal hydration bladder, etc.
If you run out of room in this pack, it's not that easy to tie things to the top, etc.
Again, a great bag for hauling all your stuff to your next climbing project. Get something different if you're doing technical stuff with a pack or have long approaches.