We've bought these for two years now for middle school use and they stand up to a serious beating and continue to perform. A little more expensive but well worth the money.
I need a binder to hold choir music one that will not split along the spine. A weak or splitting spine requires extra energy to hold it during rehearsal and performance not to mention potential disaster on stage! For this reason I chose to replace my old binder with this one and the spine seems fine. My problem with it is that I need pockets inside the cover. I tried to put ONE piece of paper in the front one and it completely split out at the bottom. I tried the back one and the same thing happened. Superglue doesn't work on this plastic either. I bought a supplemental internal pocket but it really takes up too much space in the rings with all of my music in there. My advice: If you want pockets DON'T buy this binder. Another thing that you may like (or not): The edges are also rubberized. This makes it harder for me to slide the binder in and out of my music bag. However it helps keep the binder from sliding on a desk etc. Even though I am pleased with the rubberized spine I almost rated this with one star because I was so irked about the pockets.
This replaces a binder that literally fell apart within a year. I am sure this will far outlast my original binder. In addition it holds more sheets in the same 1" space because of the clip design. BTW my wife liked the first one of these that I bought she 'appropriated' it. I had to buy a second one for myself.