These are great to keep information organized and at your fingertips. The only drawback is that the little tabs that they hang from have to be pushed in to open the rings and then pulled back into position for hanging.
Excellent design. Rings close positively. Dropping a full folder into a hanging file sometimes opens rings because of the weight of the paper. They've anticipated this by requiring that the hanging tabs be pushed in before the rings can be opened.
Only negative... sometimes the tabs don't move positively (bit of wobble).