This is an interesting, problematic application. Search the user groups; you'll find comments about how hard it is to get into the logic of the program. Searches sometimes take a long time, and unaccountable results keep popping up. (For example I am continuously told that my search terms do not appear on YouTube!) But when it works, it's amazing. I just can't figure out if the learning curve makes it right for me -- and my demo time is apt to run out before I can answer that -- I suppose that's not a good sign for an application that wants to be simply the best.

A fantastic search tool!! Just add a bookmark editor and I'll never use Safari again.

Indispensable if you do a lot of serieus reaserch.