A Year of DuckDuckGo http://www.designwithtom.com/blog/2015/3/23/a-year-of-duckduckgo
An interesting blog post about this guy's experience with DDG. The only thing that doesn't really parallel my experience is the Instant Search features. I haven't see a lot of them. I still find it necessary to go to GG for some stuff like calculations or currency conversion in the SERPs. I guess DDG is catching up.
Good read. The two biggies for me are privacy and the clean UI.