I'm routinely disappointed in the Cuil search engine. Unlike most of its brethren, it appears to treat all queries as straight text, without support for boolean operations. It treats queries as if the whole string were in quotes.
I do like the table-display of results though, and the clean front page. I still miss the Teoma search engine.
Laissez lire, et laissez danser; ces deux amusements ne feront jamais de mal au monde.