Farecompare.com is one of the most painfullly slow websites I have ever used. It takes up so much memory, it's crashed my computer 2 times. It is really painful, and I don't use it anymore because it is so slow and ruins the rest of my computer.

Two other reasons I don't like it:

1) It only allows you to search for economy & first class. There is no business class ticket search.

2) It lies. I searched SFO-FRA first class tickets, and then it says that they are available for $904. I then check, and everything is thousands of dollars. There are no first class tix from SFO-FRA for $904. It's totally inaccurate.