This is for P3D v1 versions, does not apply to V2 as it needs testing but I am not holding my breath.
-The installer works just fine
-External textures look really good, much better than FSX
-2D panels work just fine as with all AP logic
The bad and really bad
-Bad textures on windscreen and hud, just transparency issues and all is probably needed is a change to compressed .bmps (DX3) with alpha.
-VC lighting, the internal lighting does not affect the "flat" panel parts or interior, just the gauge white background paint, hence no flood type lighting.
-The really bad,,,, No click spots work whatsoever in the VC, 2D popups work though.