I use FS Build all the time and have found it to be an excelent flight planner, especially using the Route finder facility which includes the NATS for trans atlantic flights. The one problem I get is sometimes when it builds a flight using the route from the Route Finder it gets the odd waypoint confused if there are 2 waypoints with the same name, this is easily rectified by editing the list of waypoints to eliminate the wrong one. The advantage of using FS Build is that it saves the plan to the PMDG, PSS, LevelD and others in the correct format. Hope this helps.
