1) It's slightly slower than Google, which became more apparent after the fifth or sixth search of the day.
2) No images integrated with search results. I didn't realize how often I searched for images until I used DDG. At Google I usually get a few images and an "Images" link to click. At DDG I needed to add a !gi to my query.
Like JohnsonB said, there really need to be another draw besides just privacy.