Yes, it is a good project, free and community supported. The search results are very fast and relevant and best of all you have an easy to use settings/config menu (bottom right of page in Opera) where you can even change the colour settings. It is a simple click and save to add DDG to your search toolbar too.
No adverts ( though they may appear), no tracking of any kind and a much cleaner,clearer results screen with the added option of WOT ratings without the need for the WOT toolbar running on your browser.
For family use the default SAFE setting appears much more stringent and searches for expletives and suggestive terms flag up a no results notice, where as Google still offers results that are unsavoury.