I'm writing this using the Cliqz browser and I have to say I have been a very happy user for a couple of weeks now. I like the search bar (I don't search in German that often but still get quite relevant "instant" results in my experience), the integrated tracking protection and just the overall look-and-feel.

Personally, I also find it important that Cliqz is based on Firefox, other than almost all the other new browser projects out there which are based on Chromium. There is nothing wrong with Chromium, but I believe some choice / friendly competition in rendering and JavaScript engines is important for the overall well-being of the web.