I can now fully confirm after one year of use of all sizes.
Scharf they are still, even if the blue color (of course) from the ...
What I noticed is:
The drills are very suitable for accurate drilling, the oblique top center them well in stone / concrete. Especially in the bathroom (no impact by tiles) would be conventional rock drill simply too blunt and would pass. The sharp MCs are as ideal.
The penetration rate is even much faster than with the old drills with whipped without impact.
For occasional use in metal or wood (especially if you have multiple materials on each other), the drills are ok. But promise you any miracles - Holzbohrer cut course much better and wear from more material, metal drills have significantly bissigere cutting.
So: For drilling in (by) stone, brick, concrete and tiles especially clear recommendation!
For metal and wood solo there are extra sets that are worthwhile for also.
