It suits the Macbook Air 13 (without the charger or other accessories too thick) and extra pocket of the bag can easily hold an iPad Mini (you can re-enter an iPad Air instead but even if it comes off, this is in the thickness that everything is a bit "tight": p).
Still not bad for a second bag but insufficient if this should be your main source of protection and transport IMHO. For a few euros more, turn to more protections provided (eg in Be.ez. Cover Be.ez 101008 LA robe Black Addict MacBook Pro and Laptops 13.3 "Black / Raspberry) or real bags properly designed to include demmener charger, mouse and an external SD (but this will cost probably more expensive).
Chris Alyde (on Amazon.com)