On my tests so far it works quite nicely, giving me the results I want on the top places (something that never happens when I try Bing, for instance).
Being European, it puts also more weight on European sites, which is usually what we are looking for. The artificial intelligence behind and automatic correction of misspelled words works well. There are still some more complex queries that it does not understand.
However I must say that this is the first search engine that made me switch from Google.
If you want to try: www.qwant.com