I use this product to keep master copies in as I am a teacher. They do get fairly beat up after awhile (showing scratches and such) but it usually takes at least a year before they show any wear at all and I've had most of mine 4 years and have only had to replace a few.
Needed to preserve some letters written in 1970 - the clear is wonderful. Also the fact that the full width of the page is available - no need to punch holes & damage the contents of the letters. Plus delivery was the very next day. Couldn't ask for more.