I used Queen of the Skies.
Took me a while to set everything up for a practice sim ride starting in HKG. I then saved the panel state/flight info/weight and balance, for future quick access and I loved it.
It helped me with my scan (and mainly my scan), which is exactly why I bought it.
If you are not 'flight simulator inclined' in the first place, then it is not for you!
It takes a lot of patience, but it did pay off for me. I spent almost $90.00 on both the basic 747-400 and -400F add ons.