I have been buying these boxes for years now. The original ones I bought are still in good shape and I often use and reuse the boxes many times over. They are inexpensive simple to unfold and "assemble" and are very sturdy. Even when I have purchased them at full price I have felt like I've gotten a bargain given the consistent quality. Yes this is only a cardboard box but it is a workhorse. One of the best features is the sturdy handles - even after multiple times lifting and carrying the boxes the handles stay strong (I have only had one or two rip on me and that was b/c I was trying to carry the box with one hand when it was heavy enough to be picked up with both hands. I am a fan of this item and will buy more in the future.
I buy Staples Economy Storage Boxes by the 10/Pack reqularly. I have prefer this brand over the others because they are very very easily to assemble and strong. I use them in my car for my traveling files to give my briefcases a break. I store old papers and items neatly in my storage areas in the gargage. I also use them in my home office next to the wooden file cabinets. It keeps my papers and books in order. I like the feature the boxes have that are similar to the U-haul boxes having the square area in front of the box to write what's in it is great. I like them and will purchase more in the future.