It's been my home page for years. Originally i would still often go directly to google for better results, but each year the amount of times I'd do that decreased. Now I'm actually really happy with DDG results, and when I do perform the same search on Google, it ends up being less accurate. I think this is because Google has such a huge belief that personalization yields accuracy, but it doesn't. Past trends don't always predict future patterns. Google gimped their search engine in my totally honest opinion. It's completely useless until I filter for "Verbatim Search", because they keep guessing at synonyms for my search terms and randomly leaving out terms their algorithm thinks aren't important to me. Google.com is such a downright horrible experience for me, a once wonderful gateway that is now just a necessary evil at best.
I just started trying DDG after using Bing for a while. DuckDuckGo is pretty solid, and I find the fact that anyone can submit new 'instant answers' type features to the search engine to be intriguing and novel. Google and Bing only get smarter if Googlers and Microsoft employees write it, but anyone can make DuckDuckGo better. (Though it's not fully open source.)
I do use it on handhelds (my browser of choice happened to change its default
search engine to Bing, which I dislike and distrust, and used to crash on
Google). It feels a little too off in its search results for my usual desktop
work.