First I was keeping dies in small photo albums till there were too many.
Then I did that system you linked to
I am glad you asked. I had those binders. Total thumbs down. Expensive lesson.
a) they get really heavy with the dies
b) even empty if you drop them on the floor they crack badly
c) the rings are plastic and also break.
d) the pages are very sturdy but also very expensive. I cut them down for my pockets.
I do pockets now. So much easier to access them. You dont pull out a whole binder. You just flip and pull the one pocket.
So I have pockets just for dies.
I have pockets for die/stamp sets...the stamp is in the front, the die in the back with a cut down piece of mag vent cover.
I get the mag sheets at home depot-the 8 x 15 inch ones. 3 pack. You can cut 2 whole clean 5 x 7s and then with the leftovers easily make a third with scotch tape. So that 3 per sheet, 3 sheets = 9 per package if you want whole sizes. If you are going to cut them down to only what you really need for a stamp/die set, it will go farther. I use the full size for groups of dies like all my balloon dies in one. Easy to cut with regular scissors.
You may find them cheaper elsewhere.
https://www.homedepot.com/p/Frost-King-E-O-Magnetic-Vent-Covers-MC815/100345609
My other stamps are in binders. Even those get heavy. I buy the binders at costco-way cheaper than anywhere else and the pages from scrapbook.com I might have gone another way like no binders and just put the pages in large zip lock bags with their index sheets in a box. Take up less space.
Maybe someone else likes the system. Just IMHO.