I have been useing Lichi for several weeks, without any problems.
I would suggest going to an area where you have an unobstructed field of view, then program the P3 so you can easily see what happened and how the phantom responds etc.
once you are confident .......away you go, it's still very unnerving to see your "baby" disappear, but a great feeling when it completes the program and comes back.
One word of advice always be certain of your altitude as the P3 does not play well with trees and buildings!