What "Flight School" can do is to give us a clue as to what the full flight simulator will be like.
If you're curious buy it for that purpose only.
Unfortunately, what I've read by people who have it right now, is that there are a lot of problems for some people.
Specifically for those with AMD video cards. That may have more to do by the recent release of the latest AMD drivers. They've introduced strange artifacts in some games without any noticeable speed increase.
There have been enough people reporting severe problems that I'm not interested anymore. NOT AT ALL.
In regards to Prepar3d V3, I've seen no change, though.
At any rate, I'm sure that everyone's heard the old saying "never buy the 01 version".