Didn't really dig this bag. The big compartment is awkwardly spaced. The wheels often interfered with the placement of my books. Also, if you intend to use this for traveling through airline don't bother because the zipper loops are made of cloth material. So if I tried to secure my bag with mini locks they could just be cut with a knife. The wheels are sturdy though, ill give them that. Rolls smoothly and quietly but unfortunately this bag didn't suit my needs well.