I want to like it, but it gives off a bad vibe.
First of all it's too loaded and it doesn't seem to work at all without Javascript enabled. Give me a text field, I don't care about the news.
Second, no easy way to add it in my Firefox search engine list. This is really something obvious they should fix, come on.
Third, they want you to install an extension that will indeed set qwant as default search engine, but also seems to try to shove down your throat some sort of bookmark and "board" (their own thing, pinterest like?) management which requires login to their service.
http://img.nux.ro/q9M-Menu_292.png
IMHO it doesn't really live up to the expectations and it seems more like a social media experiment attempt.
If we forego the whole privacy thing which I think they are only using for marketing here, then the search results don't seem too bad (in my 2 minutes of testing) and the boards thing is interesting, but nah.