The backpack is very comfortable to wear in general. The shock absorbtion on straps makes a 15lb load feel like 10, and the evenness of it's momentum erases any insecurities I have about sprinting to the bus stop with it holstering my laptop--which, heh, I have done several times now and the laptop still runs great. Most backpacks would not be able to prevent some kind of hard drive destruction under such conditions.
Which brings me to my next point--laptop protection. This is the first backpack I've seen and felt in-person that actually offers a little extra padding around the outside and bottom of the laptop compartment, so I can fall off my skateboard with a little more confidence. With most backpacks I'd be scrambling inside the laptop compartment to see if my flat screen had cracked.
And the obvious pros. It is very stylish and the utility (for school or office purposes) is simply unsurpassed for your typical less-than-$100 piece of baggage. There's an obvious place for everything, and plenty of room for just about any officey/electronicky need you could have. And they're all fairly well placed, with plenty of "hidden" compartments that the quick and dirty mugger would easily miss.
The meshy cushioning on the shoulder straps can easily chafe if not positioned properly, although the overall idea works--make the parts that contact your body or clothing breathable and sweat-proof.
That being said, why would you need your backpack to be sweat-proof if you aren't going to take it rollerblading, hiking--sporting of any kind? Let's be clear--this isn't a Sport Utility Backpack. It's Office Utility Baggage. There are no straps, velcro, cords, clips, or any manner of fastener on the outside. There is one essentially useless attempt at a clipping mechanism that's attached to the inside of the second smallest pocket about three inches left of center. It's one of those that, in most backpacks, can be hung outside the zipper while the zipper itself is still completely closed. In this case, however, the zipper needs to be halfway open to use the hook, which would render the pouch useless. And even if you DID consider using the hook, the thing is a flimsy piece of plastic--I wouldn't trust it with anything that's too big for one of the internal compartments in the first place, which falls far shorter than my expectations of Swiss Gear quality. It's obvious that they threw it into the backpack just so they could say that it has one. As far as true functionality goes, it's a waste of material.
The biggest point I will make against this backpack is a design flaw. It's so obvious and simple, I wonder how in the world anyone at Swiss Gear could have missed it or let it pass as "good enough". As soon as you pull apart the velcro on the release strap of the laptop slot you notice it. The velcro's 'hook' side moves into direct contact with a mesh pouch that compliments the laptop slot. Hooking, sticking, and destruction ensues. Within a couple weeks of use, the damage is blatant. What get's me is that it would only take a simple 3"x3" piece of nylon on that part of the pouch, and POOF! Problem solved. It's pathetic, really. If you do get this backpack, I suggest my modification: a piece of duct tape, horizontal, on the area that the velcro would normally come in contact with.
It is a very comfortable wear, despite the occasionally chafey mesh padding on the shoulder straps. Attaching sports gear, helmets, or lunchboxes to it will be tricky at best, but it is designed more for the white-collar or electronic kind of utility. The self-destructive mesh-on-velcro thing is a horrible design, but for all intents and purposes it is an easy fix, and all the other benefits do outweigh the effort it takes to do so. At the end of the day, it's a great backpack, but I still don't feel right spending $80 on a backpack--and it's not enough of a bag for me to think of it as being much more than that. A backpack. It's at the top of it's class and close to that next tier of baggery (whatever that is). But still. It's a backpack. If it weren't for the fact that it was on sale for $20 off, I had $50 in Best Buy gift cards, and my other backpack had been reduced to threads, I would not have purchased it. That being said, I am very happy that I have it. It's cool, it's functional, and it really doesn't disappoint. If money is easy to come by for you, spending it on this backpack would not be a waste.