I needed a rolling pack for school.  I am a paralegal student and I have a lot of heavy textbooks and notebooks, plus I have to bring my laptop to all classes.  I had been using a rolling catalog case which was nice looking but had zero expansion or "give" to it.  This pack is the only one I have found that has great expansion.  It holds 4 or 5 textbooks along with a 4 inch binder AND my laptop without any trouble at all.  The front compartments are handy and best of all it has a water pocket on the side.  Before I was pulling the rolling catalog case plus a second bag for misc stuff and my water.  Now everything is in the one bag.  Plus the wheels are the quietest wheels ever.  I LOVE my new bag!