This lives up to its Germanic roots, maybe not the prettiest packaging in the world but 100% pure efficiency! My skin is normal/combination and rarely sensitive and it happily takes this every day. I leave for 10 minutes, it tingles strongly for the first five minutes (a bit like pins & needles) and my cheeks go a bit red, but that fades after 30 minutes. When I apply my night serum and oil it sinks in 10 times faster than without using this beforehand. When I wake up in the morning my face looks less craggy - the lines less pronounced, my skin feels more evenly moisturised (no dry cheeks as usual) and my foundation goes on more smoothly.