This is a superb 50 litre pack. It's nestled perfectly in between "large enough to pack your life into" and "comfortable enough to carry for long distances".
Once you have reined in the top of the pack from wobbling around (tighten the top straps), it feels very secure and comfortable whether you are walking or climbing.
My only gripes are that it doesn't (like the Stratos 24l) stand up vertically but opts to pitch forward instead making it tricky to load and even trickier to set down in wet conditions (lest it take a nose dive into a puddle).
It doesn't come with a raincover, but I was using drybags anyway.
Finally, aside from various pockets and compartments on the front and top, the main chamber can only be accessed from the top. This is annoying. In the real world, packing a rucksack is difficult enough when you're trying to distribute weight around your back without having the added inconvenience of knowing that stuff at the bottom isn't coming out till the pack's empty.
(Written by: magicguppy)