This style of binder is good as something that will see a lot of use and also be light and compact enough to carry places and not take up much space when it is stationary.
I prefer these binders over any other that I have used. The special rubberized part of the binder keeps them from coming apart with much usage. They last so much longer and with the slight rounding of the spine it is easy to hold onto for a longer period of time. I will always make an effort to obtain these binders over a cheaper choice.