While I admit that at first I had my doubts as to the usefulness of this search engine, once I tried it I no longer had doubts. You can interpret that as you wish. However, I will say that I did manage to put together at least one decent search on philosophy. Since it concentrated on online philosophical encyclopedias, I get a lot of scholarly, well-reasoned information on the thing I searched on. Before, with an unspecific engine like google, I usually only found someone's personal, uneducated rantings.