Best binder we've found for school. Lasts a whole year without ripping at the spine even when using the same binder for ALL subjects so it's quite durable. The one drawback & true of all binders (unless they're cloth) is that the inside plastic pocket rips early on as they stuff all their take-home papers in it each day. Needs to be more flexible/expandable.
The only thing I would have liked differently was an additional open/close tab at the top of the rings. Although it was easy for me to open my second grader struggled a bit with opening the rings.