I have had this pack for about a year now, it's been everywhere from southern utah deserts, 11k foot peaks, Bush wacking through thick oakbrush, and it's still rocking on! I used it on my 30 times this season splitboarding as my winter pack. I have packed this thing to the brim, stuffing every possible pocket, the support still holds up. The front stretch pocket is wonderful to shove full. I would say it has over 100 days worth of use on it, with 50% of them being packed with +25lbs, and 50% of those having +35lbs. The mesh backing is great on those hot summer hikes.
There are a few draw backs. The top pouch is attached on the back side, and at times is a bit to short to cover the opening at the top. This only occurs when your really loading the bag up. I also wish it had some pockets on the waist belt. There is also a bit of stretch in the optifit system, which at times, will grow slightly and I have to re-adjust the pack. But I only notice this when the bag is heavily loaded with weight.
Overall I have been VERY satisfied with this pack. I would give it 5 stars, but the top pocket is holding me back. For the price, I think it's a great bag. Thanks northface for such a great product!