11/10 product, windscreen wipers no longer run randomly on hot sunny days. This was really the main feature I wanted it for.
Added bonus the car politely turns my music down for me on exit if I forget to so no more occasional jump scares when re-entering.
For comparison's sake I ran the mental exercise "if I had an ICE vehicle whose wipers developed a glitch that just randomly turned them on how much would I be willing to pay a mechanic to fix it first go, permanently?"
EUR$197.72 to actually fix the problem seems reasonable in that context.