I've had my P3P for around a month now. I've got over 100 flights and tons of miles on it.
Lightbridge is the Cat's Meow! Nothing that I'm aware of currently compares to it. Once I saw it in action I was hooked. I was trying to decide between P3P (I should have gone P3A though), Chroma, Q500, or the 3DR Solo.
Thus far I'm very pleased with my decision and if I had to do it over again I would do that same thing (except P3A ) easily.
I still have my 350QX2 A/P but it's now my back up platform. The camera alone is worth the upgrade.