Experience with Heico / Sachs Performance suspension?

Moin! I have already used the search function and have already received a small impression, but I would still be happy about further experiences with the Heico / Sachs Performance suspension. Originally the suspension consists of tighter Sachs gas pressure dampers and Sachs 35mm lowering springs. According to some contributions there was the Heico suspension also with Eibach springs. This variant is uninteresting for me. I recently skipped the complete Heico Performance suspension This is why I am particularly interested in the Sachs springs. How are they in terms of comfort? Rather a little harder or a little softer than e.g. Eibach, H&R, etc.? Currently I drive Koni yellow with H&R springs, but this combination is too uncomfortable for me. Therefore I think about combining the Sachs springs with Bilstein B4. What about it? It is important for me to have maximum comfort with a discreet lowering. I don’t care about sportiness or even race track suitability. The series suspension is not an option for me and the advantages of a KW coilover suspension do not open up to me as a country road and city center driver. Does any of you currently still drive the Sachs springs?