I have mentioned this before but never seem to get a response. I am posting it here because the Phantom 1 part of this forum doesn't seem to get much activity. I have a Phantom 1 purchaced April 2014 and got another one on 1/13/15. They both fly fine. Haven't flown the newer one much. The problem, as I see it...is giving it full throttle for takeoff is sluggish. The spool up of the motors is too slow in my opinion. This leads to tip overs. On the first Phantom, I have the S1 bottom switch set to manual. When taking off, I drop to manual, props spool up great and it lifts off fine. Then immediately go to gps and fly. These are stock Phantoms. I have not changed gains and don't plan to. Just cramming the throttle up, in gps, is slow to react. Manual spins up fast with a good lift off.