Now that I've got an iPad I have to use it for something. This isn't the first game I've got, but it's the first that isn't free. For me, who even have invested in three screens only for X-Plane (but it turned out to be useful for other things too) I found it well worth the money, even if I don't use all its features.
Mostly I use the map for navigation.
And since some cockpits don't look too good with three screens, the PFD displays are also useful although I still don't have a way to mount it without hiding part of the centre screen -- which isn't that much wrong anyway.