Updated Review:

Changed to 3 stars from 5. While it is absolutely true that this bag can hold more than you probably think it would, it is just not comfortable. No matter what, the bag does not ever seem to settle into a comfortable position on my back, and due to its shape, it always feels like it's pulling me backwards. I didn't realize how much I was missing until I got the North Face Recon pack, and now this thing has been relegated to a different duty. The main compartment is actually so big that it has to be absolutely stuffed for it to balance properly if anything is in the front, and at that point it puffs out and back so far that it's just not comfortable. The straps don't really help, as they appear to be designed in a way that does not keep the bag high up on your back. Even when fully tightened up, I always feel like I'm working against this bag, and on top of that, as I mentioned below, the extra slack on the strap pulls is comically excessive, hanging down far past my hips. It's not a total loss, as I am a musician and I can definitely still use this bag for all of my cables and tools and whatnot, but it's definitely not my primary bag any more. It's worth the price for the carry space alone, but I would not want to take this thing on a hike or any other situation where I needed it to be comfortable.

Im still running this bag through the various trials and tribulations a bag has to go through, but so far Im very happy. The amount of space in the main compartment especially is impressive, and it doesnt even seem it when you look at it. I went to the grocery store the other day, and the main part of the bag happened to be empty, and I decided what the hell? - time to see just how much this thing can take. You can check the attached photos - I took a whole grocery bag and literally dropped it in there. A full carton of orange juice, a can of coffee, another large juice container and a bottle of hand soap - fit in with absolutely no issues! As you can see, there was probably another 30% of the room left near the top of the compartment where I could have fit even more. Please note: the smaller compartment was LOADED with work folders and documents, as well as an iPad. The Fat Boy swallowed it all right up.

With it all loaded up, it felt fine on my shoulders. There was plenty of weight but it wasn't uncomfortable. Ive seen others complain about the zippers, but they feel sturdy and smooth to me. They only get caught when the backpack is more on the empty side and the zipper track itself isn't lined up, so I don't even know how that would be avoided.

The one criticism I have so far is due to the shape and the oversized main compartment, this pack will sit awkwardly on your back if the front compartments are more filled than the back. This is a pretty specific complaint though, as I like to keep my work stuff in the front part and then keep the back open for workout clothes and other bigger stuff that won't often fit in other bags. I doubt many people will run into this issue.

The only other weird thing is that the strap adjusters are long...strangely long. Right now mine has about 6 inches of adjustment remaining and the outer part of the strap with the eyelet is about 12 inches, just dangling. That much slack is definitely not necessary or usable, but its not a dealbreaker.

Pack seems to be well-made and durable. I will update when I take it out on a hike. I was a bit concerned about not having a chest strap, but it seems to fit my frame really well as is, so it might not even be necessary. Ill update as I keep going!