DDG for life (honestly the first thing I do with all browsers, mobile or desktop, is swap out Google for DDG).. It's good enough, and when it isn't I can just throw a '!g' on it and hope Google will be better. Mileage varies on that, though. Some people think Google is still the best search engine, and some of us don't (I mean that in regards to quality of search results, not 'Google is evil' or some other emotional metric), if you're still in the former group then switching to DDG may not be your best move.