These strings were used on two 3/4 double basses.
With a similar construction & tension, these strings remind me of Spirocore weich's, also because they have a similar character and sound. They might be slightly sharper on the bow, or maybe they take longer to settle in. A very good soundquality/price ratio.
However, as a downside I broke one of the strings (on the peg), which has never before happened to me with steel strings. Though rope core, the core is apparently brittle, or the string was wrapped to tightly. Thomann has replaced the string.