I rated the extractor hood three stars because: I can't know whether the internal construction is a blend of steel and aluminum or if it is stainless steel as they say. The finish is relatively good, and one should be careful during installation to wear gloves to avoid cuts. It has not yet been tested under heavy cooking conditions; we will see later how effective it will be. What upset me quite a bit, and for this reason the three stars, is that the covers - filters underneath that are visible and cover the extractor hood and include the aluminum filters, are made of plastic that seems very fragile, and I believe that over time it will degrade and fade. Also, the speed and turbo selection switch is quite vague; it does not lock into any setting. It gives the feeling of a potentiometer. And it says Bosch made in Germany.
22-10-2024 update...
After three months of operation, everything is smooth except for the suction power... ineffective in tough situations!!!

The button of the extractor fan is very fake and does not lock between the 3 levels + the turbo it has, resulting in having to bend down to see what number you have set it to, as levels 2-3 do not have much difference between them