I like FS Passengers very much, it makes the experience of passenger airline flight much more immersive, and it's a lot of fun. My only criticism (and it's a BIG criticism) is you cannot save a flight in progress and come back to it later. So if you want to fly from Paris to LA with it, you gotta do it in real time, or else stick to shorter routes (unless you have a lot of spare time).
But it's worth getting just for the passengers screaming when you bank madly to scare them.
I love the smell of napalm on my cornflakes.