15 years of flight simulation experience tell us that sometimes little things are important.
When you are doing the flight preparation you have to navigate through several menus to refuel your aircraft. In the refuel page you have several tanks and have to write the quantity in all of them to balance the fuel.
FS Refuel do that automaticaly in a realistic way. Choose how much fuel you want and FS Refuel your aircraft in a balanced way.
Simple things, easy flights!