Based on the previous reviews by the previous reviewers, I too have slammed in the cartons. Not only the price of about 1.50 / carton are terrific (DIY cardboard collected at about 1.80 on), but the boxes are delivered without expense to the front door! A big plus when you have no car. For product: If one folds the handle stabilize properly, this act even without loading very stable, so not as if they would tear if they are loads with 2 books. When moving the cartons were loaded with approximately 10-25 kg / carton. Record: 20 of 20 use boxes have survived the move without using debilitating damage, are folded back (which is fine) and wait for the next use!
A thoroughly recommendable product that is cheap, durable and practical!