I have had it for 2.5 years and I am extremely satisfied. It is high quality, aerodynamic, opens from both sides which is very important and I use it all the time, it has a maximum speed of 130Km/h which is also very important for safety, it fastens with quick connectors (you tighten them by hand) which makes installation and removal easier, the 500-liter one fits a lot of things and is incredibly convenient for trips, summer with kids, beach accessories, umbrellas, etc. The 500L one is lower than the 450L one, which is an advantage in terms of aerodynamics and fuel consumption, but you can't fit very tall suitcases or objects because they don't fit and sometimes it makes opening it (width of opening) more difficult. The fact that it is lower helps not to exceed the height where there is a height restriction, you fit more easily in low places but you can also open it more easily to put in or take out things. It is super light and I personally install and carry it by myself, with care of course because it is quite long. In general, I think it was a very good purchase and I would definitely buy it again.

Update 16/04/26: The lock, as others have written, sometimes gets stiff so when it starts to get stiff I spray WD-40 and it immediately smooths out. Spray the key as well and then put it in the lock and turn it several times left-right until it smooths out. Repeat if necessary.

Attractive, low and aerodynamic, easy opening and closing, the lock doesn't seem very high-quality (the key struggles to fit inside) but it gets the job done. The double opening is very convenient, I needed it from the very first use.

The low height combined with the large rotary fasteners inside make it difficult to organize large suitcases. With medium-sized suitcases, there is no issue. It's better to test on the spot if you have a large suitcase. Also, be careful not to block the arms of the locks with the luggage when loading.

The noise starts after 100 km/h but it's not particularly noticeable, until 130 km/h which is also the official limit, there is no problem during the trip. The fuel consumption is minimally affected, maybe 0.5-1 liter/100 km.

On the other hand, the low height (referring to the 500-liter version because the 450-liter one is considerably taller) helps in an SUV with a height of 1.62 meters, and the roof box barely fit in closed parking lots with a height limit of 2 meters (there are about 5 points left on top that still make you anxious in case it hits something).