If you don't plan on filling the binder all the way you're probably good. But when it starts to get nearly full the top ring doesn't quite shut all the way and it's difficult to turn pages because the upper part of the page slips between the rings. Otherwise pretty nice.
Solved my overfill 4" notebook problem. I like that the rings are not circular but fairly straight top to bottom. It holds a large number of pages very well. The front cover also hinges a couple of inches past the end so it covers the pages better when it's full. I do wish it came in more colors than black but for function this product gets five stars from me.