Very good build quality. Support category equivalent to monolock, but clearly superior and sturdier than Givi, while the mounting plate is included in the package. Very high quality opening and closing of the lid that stands upright on its own, without the risk of accidentally locking. It has a slight curve on the back, without protrusions, so an additional backrest is not necessary, unlike the SH48. Anyway, TOP CASES are not intended for armchairs. Tested, it fits 2 helmets size L & M. Up to 150km/h I did not notice any shaking or strange swirls. For me, it is the ideal size as it has plenty of space due to its shape without protruding and causing discomfort. It upgrades visually and practically, as it fits perfectly on a naked Honda Hornet CB600f PC 41. Value for money at 190€ (2024)