The handles can be strengthened by the collapse of the side parts. In fact, so only the handle opening is reinforced, enabling a more comfortable wear without cutting into hands.
As it is precisely with cardboard boxes, if they are packed too heavy, the handles can tear naturally. To me it is in spite of adequate weight happens - but rather "fast grab time on the side and pull / move the box" because.
Point deduction, there unfortunately but because the handle - I mean, for the Pries you can not expect much, I was perfectly happy with the boxes (especially the handles) but simply not.