I was using a "Duck" device today for the first time, and I wanted to look up some information about it online. I typed the first words that came to mind ("duck rope pro") on Google.com, and the #1 hit is an Amazon.com page that lets me buy it. Now I know the manufacturer and full name and basics specs, and it's now easy to find the manufacturer's webpage and user manual.

I typed the same terms on DDG, and clicked "more results" and scrolled down. The first relevant hit is #84, which is a link to a generic product listing page on an Australian online store. So DDG found 83 incorrect interpretations of "duck" before the rope fall protection one that I intended. The one it did find is pretty obscure. It's located neither in the country I live in, nor the country the device is made in.

Curiously, hit #80 is for google.com itself, so it seems even DDG gave up and pointed me to Google before finding a directly useful answer.

I like DDG's principles, but as a search engine, it's just not practical for me.