Did I buy the Mammut Creon Pro 45L for my remote hike along the Appalachian Trail in the last year. The backpack is gone after about one fifth of the hike (600 KM) in broken. The Rights shoulder has dissolved gradually from backpack and that he was no longer usable. I then wrote an email to mammoth and the answer was that I should convert to backpack in Ladengeschäfft in Germany since I bought the backpack there. Since I was just found myself at this time in the US, of course, not so possible. That's the one then by mail Spare much better with other manufacturers. The total weight of my equipment was approximately 8 kilograms, which were not a problem for such a heavy backpack should.
The comfort was very good, the back always dry and at the hip, I had no bruises or similar. Even after 3 weeks Hiking and not 40 kilometers daily.
If the backpack did not go as quickly broken and the service of mammoth better I would give 4 stars. For five-star the 45L version is just much too heavy with 1.6 kg net weight.
