I have used them in the past and when there was a good sale on them I purchased a number of them for the T.A.S.S.E.L project in Polk county Florida. They collect school and hygiene supplies to help children living in poverty get help and thus graduate (hence the tassel). Check them out on facebook.
Decided to invest in 1 nice binder this year instead of 2-3 inexpensive ones that always break. The rubbery binding seems to be the key to it not falling apart when the kids are rough with it.