I liked the clear over-cover that can hold designs or extra important paper. I also appreciated the rings being fastened to the back of the binder rather than the spine; but I would have preferred the D shape rings rather than the O shaped ones. This binder serves the purpose and was available in ample quantity in the store to supply my needs. It could be a 5 (IMHO) with the ring shape change (from O to D). Thanks for asking.
I was on a trip and wanted to use some down time to write up research notes. This and the accompanying paper fit the bill -- I was so glad to find it I didn't want one of those full-size binders.
Like a larger one these have the features I want like the outside sleeve so I can add a photo or title for the notebook. I use them for each play I am prop master for.