The features I most need are: routing options, fare class codes and multi-month fare calendars. Only Matrix has all 3 as far as I know. Often, when I call the

The features I most need are: routing options, fare class codes and multi-month fare calendars. Only Matrix has all 3 as far as I know. Often, when I call the airline to book a great itinerary I found on Matrix, the airline won't believe the time/price. I'll have to convince them to trust me and make an itinerary from the flight numbers. It's often faster and cheaper than anything on the airline's websites.