Appearance - very important.
Color - very important.
Materials and processing - very important.
Price - at least not unimportant, but I certainly did not spend a fortune.
All the above points was Cartrend 70271 to my complete satisfaction!
The panels are light, well painted, and well finished.
The assembly is very easy, I only had the short but good and completely sufficient description look through. If one considers that there is no pressure / impact in the center of the stop to be made, but a slight pressure (possibly stroke) on the edge - after having set the aperture already on the edge - so the diaphragm is mounted faster than you can see : Total length of about 5 minutes (incl. unpacking and "read" the description).
For several days on the vehicle (a white Skoda Yeti) and there is no aperture broken or fallen down.
Definitely good value and highly recommended! Buy recommendation !!
(Frankly I do not understand the negative reviews - does not matter, I do not understand everything so :-))