Does anyone out there use any other app or web site to scan for cheaper fares?

In the past year, Google Flights does not seem to be as good as it used to.

It can still see lower fares for international business class travel. Some Asian airlines though seem to be blocking their fares being displayed on GF. As for US carriers, not all options show up on GF. Moreover, GF seems to like to put forward fares from online travel agents, and there is no option to ignore these. I have also noticed that in the past year, GF has been late posting changes in fares.