I have been delivering medical supplies with a 125cc scooter every day for the past 2 years using this suitcase. It replaced the Piaggio one, which broke within 9 months. The Piaggio was poorly made, so we replaced it with this one, which is bigger and of much better quality. I have put heavy boxes inside, 5-liter materials, and even heavy objects weighing over 10 kilograms. I drive fast and encounter potholes every day on the national road throughout Attica, but the Kappa suitcase has not suffered any damage. I have never seen a better quality suitcase. It withstands heavy and rough use, and I am impressed. The manufacturer specifies a specific weight it can withstand, but by my own choice, I have put more weight in it and it still didn't suffer any damage. I have a reinforced base from Kappa for extra durability. It doesn't notice anything. I weigh 110 kilograms and even with a loaded scooter, I hit potholes and it doesn't break. The Piaggio flew off on the road, completely detached and broke. And not just one Piaggio, but three in company vehicles broke and they were very expensive to replace. This one is cheap, high-quality, and bigger in size.