It cost more than a regular plastic binders but it doesn't break down around the edges. And the binder ring opens and closes easily. If it's going to get used every day it's worth the investment.
This is a decent D-ring binder. It has rubbery trim along the folding portions at the spine and along the opening edges/ends of the binder -- this makes it easy to grip but they also get caught up in my book-bag making the binder a little annoying to retrieve or put away especially if there are more than one in my bag. The D-ring design holds more paper than the old-fashioned round design but it can be difficult to turn pages especially if the binder is rather full. In general the binder seems pretty durable EXCEPT for the clear plastic view-window on the front -- the plastic tears quite easily so be careful inserting or removing your cover page.
I am an elementary music specialist and I purchased this notebook for my lesson plans. Each grade level has a section as well as an overall view of my plans for each week.