I have the Cockpit Premium and Deep Plastic Cleaner, Gummi Pflege, Colortec, and their concentrated washer fluid. I recently got the Colortec by mistake but I suspect it will be a happy mistake. The Cockpit Premium is my go to for dashboard. Although I do like the Sonox Dashboard cleaner too.
The Deep Plastic Cleaner is great! My ride never needs it, but my oldest son treats his like a trashcan! I like the idea of the Gummi Pflege but no idea if it really works. The washer fluid works great! I mix up a gallon with distilled water and use it in all the cars.
Long ago I tried the Pearls wash but I wasn`t overly impressed. Not that it wasn`t good, I just prefer some other ones.