I have 7 of these binders for my sheet music. I buy the plastic sleeves and the pages are easy to turn and it stays clean and neat. And the best part the binders were on sale so I bought 3.
These are the best quality most durable and easy to handle binders that I have found anywhere. I also like that the material does not appear to be that toxic vinyl that most binders are made of however it is still plastic. Great selection of colors easy to slip in pouches for cover pages and side tabs.