I have phantom 3 advanced and I fly usually in P mode. I read about ATTI mode but not to much. Can you please tell me is ATTI mode is better by  P GPS mode and have I bigger control in ATTI MODE or less control in ATTI MODE. Have you some recomended for me when and where that I use ATTI MODE? In ATTI MODE  is easier ( softer) to control phantom?

And one more think . When I use ATTI MODE how far and how high I can fly? Have I some max. distance in ATTI MODE. Thank a lot

See http://forum.dji.com/thread-55766-1-1.html

In atti mode your Phantom ignores the GPS.
It holds altitude but does not hold position and can be blown by the wind.
Distance and altitude are the same.