After a short flight, I am disabused. The wheels give clearly audible noise even on smooth surfaces, even flew (baggage checked) and with a significant crack / break above the rear wheels get back. The case is now useless, irreparably, so to dispose of. Too bad ....
Conclusion: As on-board luggage or pulling / Road Trips possibly useful, otherwise I advise against this case, rather spend a little more money to get shut a branded product. Hard or not, everyone must decide for themselves, since there also qualitative differences. A star I give for the design and exceptional features, otherwise, Tollbag- never again.