I bought this one because it was one of the cheapest (189€) in this size (340 liters).
The basics...
First: it was installed on Fabbri bars.
Second: It is installed with type P bases, so you can't avoid the screwing and unscrewing for putting it on and taking it off. Fortunately, it has screws that tighten by hand without needing tools.
Third: it is relatively lightweight, so you can put it on and take it off without help.
The practical...
For its liters, it holds quite a lot since it is well-designed spatially. That is, it is not long and shallow nor tall and narrow. To be precise, I could say it fits 3 carry-on bags (vertically in relation to the luggage rack and laid flat) and there is still space behind, in front, and on top for various small bags, sacks, and flexible items.
Personally, it suited me well.
In driving... okay! Up to 130, you don't hear anything unless you are in silence in the car with the radio off. After 130-150, a aerodynamic noise can be heard, but it is very tolerable. Of course, the manufacturer says up to 130 km/h for safety reasons, so okay! If you go by the book, then all is well.
Also, because you have a volume above you when there are side winds or from trucks, etc... you feel it more intensely on the steering wheel.
I imagine all luggage carriers have these issues, of course.
As for construction, it has quality plastic, opens and closes very easily, and looks very nice in glossy black. It definitely looks more expensive.
With water, it also doesn't seem to have a problem!
I give it 4 stars because there will definitely be better ones!
It is definitely a VFM product!