When that time comes, there are a few add-ons which I personally believe (my opinion) one should own to help give you that additional level of immersion we all seek from our flight simulation experience. But after a while, you might want to take your flight sim experience to the next level. Yes, P3D is pretty awesome just by itself, out of the box. If you’re new to the world of Prepar3D v4 or just new to flight sim in general, you might be wondering which add-ons I would recommend purchasing to enhance the flight sim.