Beefier rings than the more basic model and stiffer *and slightly thicker* sides for a better lay flat presentation. Took advantage of the buy more for a discount in-store special and already have 2 in use. Usually immune to these offers but not this time...
I routinely buy this binder. The covers are stiff not flimsy. I appreciate the clear envelope on the front inside cover to hold receipts/notes/clips etc. The ring design allows for flat pages with no curving at the rings when it gets towards full and pages don't slide when closing the front cover. The sleeve on the outside front allows for unigue covers and the same for the binding sleeve to identify the notebook on my book shelf. The color choices can work great for separating topics/subjects/clients.