I use DDG as my primary search now. Have been for months. It's getting a lot better. I'd say it's as good as Google about 95% of the time now. For about 5% of queries I end up bumping over to Google, but over time that's shrunk from ~15% of queries.
I do wish the "defaults" were more trackless oriented though, for example, !i searches images... on google images.
My pattern is if DDG finds nothing of value or brings up too much noise, hop over to Google and sometimes it does better. If I can't find it via either search engine it's probably not out there.
I will say that there's rarely a case where Google is worse than DDG... unless you count the tracking and near-monopoly issues but those are peripheral to the core function.