This is the perfect case for the 3.5lb subnotebooks, it has an extremely durable ballistic nylon exterior that holds up to abrasion, unlike the faux leather/vinyl that readily tears, especially where the strap attaches and rubs against it. Where the vinyl case rapidly looks ragged and beaten up, this case still looks pristine and new.
The compartment is sized for the smaller notebooks, which is its intended purpose- it's not supposed to be an overnight bag; if that's what you need, a different model would be in order.

The velcro on the outer flap is a noisy on opening, but it does hold well-
It has a decent amount of compartments, with an outer flap to hold the accessories such as ac adapter, mouse etc.
Another compartment on the back is great for quick storage of papers and folders.
The hardware and carrying strap is very well made and will hold up to daily use with no problems.

Highly recommended for subnotebook users; very sharp looking case that affords good protection and durability.

This bag is roomy enough to fit comfortably even my Dell Inspiron 8100 with 15.1" screen (the dimensions of my laptop are 13.03" wide, 10.8" deep, and 1.75" thick, which is apparently quite large in the laptop universe). However, it's obviously Targus's no-frills model.

It's quite slim, which can be good for short jaunts, but also comes with some disadvantages. Most obviously, the padding is skimpy. That applies not only to that around the main compartment but also to that covering the handle (made of really stiff fake leather) and the detachable shoulder strap. "Marginal" would be too generous a description; this case is definitely not made for long trips with heavy interiors, not unless you expect to be shifting the bag from shoulder to shoulder or hand to hand every few moments.

Also, there aren't many extra pockets. In fact, there's only one external pocket (the 13" x 9" x 2" one), which opens and closes only by Velcro, and has no sub-pockets. Yes, there are smaller subdivided pockets inside the main compartment where your computer will live, and this compartment nicely opens with dual sturdy zippers along three of four sides. But these smaller subdivided pockets face directly onto your precious laptop itself, without any padding other than the thin film of nylon that holds your extra goodies in place. Personally I would never use those pockets for anything firm and bumpy, even pens, for fear of cracking my laptop's case. That makes those pockets basically unusable unless for soft things like papers, which would fit better in the outer pocket anyway.

There's also a gimmicky removable divider in the main compartment just in case your notebook is so small that you can fit your AC adapter right beside it in the main compartment, in which case you can use the padded divider (detachable by Velcro, of course) to create separate living spaces for those two items. There's also a Velcro strap in the main compartment to restrain your laptop in its living space.

Basically, this case is adequate, for low expectations. But high expectations would include being comfortable carrying the case and bringing lots of additional items, for example if you want this to be your only carry-on piece of luggage. The only way you'd fit your hardback Harry Potter in this bag is if you left your computer at home.