Incredibly sturdy binder. I have a few binders from this brand already, and when my school required this excessively large size for a project, I knew what brand would last. Definitely buying this brand again. With a binder this large, the pages are going to be a little difficult to turn but that's with any 3 inch monster binder. The edges are reinforced with the black rubber/plastic stuff so it doesn't come apart like regular binders. When you get this type of binder, you know it will last you a long time.