I’m using the DEAN 50L pack for ultra-distance mountain expeditions. I’ve had the pack on my back for days at a time, 8-10 hours a day. It is durable, versatile, roomier than expected - overall a solid pack. Easy access thru the zip system is A++ and the main reason I bought the pack. It does not disappoint. The shoulder pads, hip belt and frame are a bit stiff, but acceptable. The chest strap slips up on the plastic track and shoulder tightening straps also slip slightly thru the plastic cinch - both easy to correct but annoying. It‘s a design flaw - the chest strap track and grip need to be tighter and the shoulder tightening straps need to be wider. All-in-all, for the price, I’d recommend this pack.