Even though Cuil doesn't know that it is, (at least not on its primary search results for 'cuil.com' of a few days after their launch (which incidentally has the most incomprehendable presentation of any search I've ever done on google (the results of which I won't copy here in case of litigation (but I'm sure you can find it on google in the archives)))), I have experienced some excellent results on searches.

The first few search results were appalling and the pages they linked to were covered in ads and I almost gave up any thoughts of home right there. But I'd read an article in the New Scientist and I expected more journalistic integrity so I persevered. The following day I tried again.

I was investigating a google maps API bug that didn't centre an infowindow, (javascript mods between versions caused this pop-up window which should be centred in the map to be too high and mostly chopped off at the top (we rigorously test our code and discovered the issue after deployment testing)) and this cool search engine showed me semantic alternatives for my search terms. This led me straight to the solution (still half an hour of unbilled time to implement the solution start to finish) of changing the javascript to include the last version that presented info windows correctly, v2.118.