I have tested the results of this program for accuracy by comparing it to the same figures I used in a manual, on-paper weight and balance. The results were the same. This program does exactly what the publisher claims, and does it very well and easily. This program allows me to very easily and quickly test placement and weights of options, accessories, possible passenger and cargo weights. Two exceptional features are the simultaneous display of "0" fuel and "take off" weight, and the ability to quickly switch between several different sample aircraft.
It's crucially important that if you use this program, the correct data needs to be entered first.