These are the best binders I have ever used! They stand up to wear and tear of daily abuse. They do cost a couple of dollars more but I have never had to replace one. My oldest binder is 7 years old and still going strong!
these are the only binders i buy for my kids for school; last all the year IF you use the bottom opener to open the metal rings. if you pull the rings open with your fingers the rings will pull apart slightly and papers will fall out.