Thanks to Amazon Prime, I could use this set already the next day. I used it to make matching pillowcases to my quilt. I realized immediately that this was not a bad buy. The fabric squares I've probably cut twice as fast than before with the scissors as a spared by the best ruler, the paint on the squares. The ruler is nice and thick and thus also difficult, so it hardly slips during cutting. The cutting mat serves its purpose well. The tailor was also very convincing, especially at the moment when I met him accidentally just slightly touched and my fingers started to bleed easily. A clear proof that the blade is quite sharp.
I would recommend this set each Patchworker to speed their work and simplifying wants.