Shortly into use. I still have holes made in the separator sheets to abheften things can when needed. From the outside it looks solid, unless you can say it in plastic, a little better more stable external walls would have been, but it works. The subjects seem large enough, also punched pockets have in place. Pleasant is also the rear wall with folding page as filling location for general documents.
If you have to work on different things / projects, the division into compartments is helpful. This portfolio helps.