Nick Chopewrote a review of Salewa Alptrek 50+5L Backpack on August 13, 2017
Familiarity: I've used it once or twice and have initial impressions
I ordered this and the Alptrek 40 to compare and find the right volume. I really want to keep both. They have all the feature I love and that are very hard to find. First, the side stretchy pockets are actually pretty easy to reach while the pack is on. Great for snacks or other quick-access on the trail stuff. Hard feature to find. The suspension seems quite stout. I walked around the house with 30lbs and it felt very comfortable and weightless. Hours on the trail may prove different but I have high hopes. The 50 is definitely 10L larger than the 40. With the same stuff, I was able to get an additional 70m climbing rope into the 50, easily, where the 40 was just at the top of the main compartment with the "stuff". There are 3 zippers on the front. The bottom half-moon zip (seen in picture) accesses the main compartment. The other 2 (left and right, one seen in the picture) access stash pockets separate from the main compartment. There is a bellows in the outer fabric that allows that stash pocket to expand regardless of how stuffed the main compartment is. Perfect design. The compression strap snugs it down and backs up the zipper. Rope storage seems to be just a strap over the top from the grab handle to front of pack - nothing special. The overall profile is a little wider and taller than the 40 to get the extra space. I did not notice it being much deeper - that's good so that the pack doesn't pull you backwards too much when loaded.
So you get a great suspension that feels amazing with 30lbs, easy interior access with the zipper, 2 stash pockets under the front panel, and 2 stretch side pockets for on-the-trail access to stuff. Oh, and the 2 pockets on the hipbelts are great. An iphone7 with a case fits easily.