Can you use Boolean operators such as AND and OR?

Is adjacency searching possible? (i.e. phrases)

Can you search by date, file type, or language?

Is help available?

Are search examples provided?

How accurate is the relevancy ranking?

How useful are the descriptions?

Are "last-updated" dates provided?

How many sites are indexed?

What types of sites are indexed?

How often are new sites added?

How frequently are links checked?