first of all, seeing the same bag on other sites, they state that it fits up to 14inch laptops. I own a 15 inch macbook Pro with Retina Display, and this fits comfortably without any problem.
It is nicely compact and slim and can perfectly fits everything i need- Laptop, power cables, wireless mouse, hard drive, pens, random other small accessories and notebook.
It also fits a kindle in the exterior pocket, as well as an iphone 5 on the strap pocket with another pocket for the headphones.
There is also a discreet "security pocket" on the back, which could easily fit a passport or wallet etc.
Build quality seems very good, and it is padded well enough to take the odd knock or so (i would advise to drop from a great height) without worrying.
The price was very reasonable considering the build quality and features included.
Overall, i personally have no faults with it, as it is just what i need. I would have like to have more colour options, even though it is available elsewhere in black, they did not state that it would fit my laptop so i did not want to take a risk.
If you want a compact / slim bag to fit your laptop and essential accessories at a reasonable price, this bag is ideal.