I'm a teacher, and I teach on a block schedule, 3 classes per semester. I have two of these  - one for students to turn in work, and one that stays on my desk for graded work to be returned. These have held up nicely for over a year and a half. I use washi tape to label the front of the trays (1st block, 2nd block, etc) so that I can change them out for the semester change depending on what blocks I'm teaching. I got lime green and blue and they add a pop of color to my classroom. They sort of nest into each other making storage easy. I highly recommend them.