I have an older version of this backpack with a friend who has the newer front opening version as seen here. The front opening is only useful if not using a pack liner.
I have carried a tent, an exped 9cm mattress, a black wolf inflatable pillow, 3 changes of clothes and food for 3 days without using the extra +10L. This pack packs well and is a joy to carry on the back. You won't even know it
This review was written in the old system and had content requirements that are different than reviews written today.