I have a big huge 18 Asus ROG gaming laptop. Almost no bag can accommodate this thing. Not only can this bag hold this laptop, I was able to fit the laptop inside a sleeve in the bag, add in the charger (which is a huge brick charger), plus my keyboard, mouse, PSP Vita (in the Vault hard case) charger, my full 3.5 external HDD power adapter, ANOTHER laptop and charger (slim 17), and still had a bit extra room for some other extra stuff too.
The bag seems as sturdy as you can make a bag too. The double lining or whatever seems to hold up like advertised. The strap works great too. I can hold a lot of weight on my back for a long time without getting tired like I would with a backpack or something.