We have had this backpack for about a month and it has been great so far. We bought it for my 3rd grader who lugs a huge binder and some heavy library books most days to school. It fits all of them perfectly. I love the rubber backing at the bottom. Also the bag by itself is quite light, so adding the books does not make it too heavy. The wheels are quite big and roll smoothly. The telescoping handle is very sturdy too. All in all we are very happy with this purchase.