I did so, too.

I've done so repeatedly over the past years, each time giving it one month to evaluate how useful its result are to my productivity before deciding whether to swap back.

After now giving it three months, I can say this:

• As much as I complain about Google's results having gotten worse, fucking hell is Bing sad (which AFAIK is still the majority of DDG's result input). It's orders of magnitude less useful than what Google digs up for my mix of gaming, board gaming, cooking, trivia knowledge and programming input.
• Apple Maps is still an insult to people actually wanting to find things on a map on a desktop system and I cannot believe they have not replaced it with something else, no matter what. Openstreetmap would be a godsend. The current state just means I used an extension that hardwired Google Maps into it so I don't have to add the !-command each and every time.

In theory though, DDG is nice. If they can improve the quality of their results, I can work around the maps issue. But it's still significantly behind Google, but I also have to see this in context of course: Google has a fuckton of money to throw around, for the budget they have, DDG is impressive.