I use backpacks a lot, as I routinely ride my bike to work and need to carry: my laptop, work papers, and wallet checkbook etc. I also change clothes when I get to my office, so I carry a change of clothes as well.
Overall I like this bag a lot.
Pros:
The bag is excellent quality: it feels very sturdy, it is well balanced, and has really cleverly designed pockets and separations. I can carry all these items without the bag getting too bulky, and there are enough separations that my clothes don't get tangled up in my wallet etc. I also like how it looks, and I like the brand (I've always liked Swiss Army knives, and love my old Wenger watch.)
Cons:
There are a couple of design issues I have with this bag the made me give it 4 stars rather than 5.
The main problem is this: the handle at the top of the bag is not placed well, and if you are not careful, it can cost you your laptop. Here's why: the handle is placed too far to the front of the bag. This means that if you hang your bag on a hook or coat rack for any reason, and if the bag is full, the bag could slip off the hook, because the distance from the back of the bag and the handle it too big. The bag doesn't need to be extremely full for this to happen, simply having your laptop in a sleeve in the laptop compartment will do this. And that's exactly what you don't want to have inside your backpack if the backpack falls off a hook onto the floor. You might think "why would I want to hang my backpack on a hook if it's full?" Imagine you're in an airport and want to hang your backpack on the hook of the bathroom door. It would not make for a happy trip... You don't want your laptop in this bag if the bag falls down.
The second problem I have, less serious more of a nuisance, is that the back and front compartments of the bag are not completely separated, on the bottom of the bag items can slip from one compartment to the next. This means that sometimes you're fumbling to find an item in one compartment and it turns out it has slipped to the other compartment.
Overall this is a very nice bag, sturdy, well designed, comfortable to wear. Just be careful with hanging the bag on a hook...