They need to filter porn out of their search results (even for common queries like "hat", there's only porn) and perhaps be more resilient to SEO techniques since it looks like there's lot of spam on top results. Queries with common words such as "cat" return almost only irrelevant results.
I'd really like to see that kind of project working as a good alternative to Google, but as it is it's not really usable.
I'd really like to see that kind of project working as a good alternative to Google, but as it is it's not really usable.