Because of the price and the fact that you can fix the problem with the Schraubenkanel fast itself, I give total won 4 stars. Wen optics interfere: my mother I have the bar relatively close mounted to a cabinet (approx 5cm distance), so that you can see the bar only correct if one bends down slightly and "in" the closet look closely WILL - so it falls not everyone immediately apparent.
In addition, the bar should already rather "too high" are attached as "too deep" because when you a knife will "drag on for itself," this will require by the magnetic force considerably more effort than if one of the things simple rather down by bar "subtract" - below should therefore be some space available. This plays a role when you want the bar mounted above a countertop, but nuterhalb a cupboard, as was the case with my mother.
But all in all it is for me good 4 stars.