Just had to share my experience, I first bought a PS3S, and lost total confidence in it as I only managed to get 40 meters max before all warnings came up , weak gps , signal loss and things like that , I started to talk to an Advanced owner that lived in same city , who advised me to take the drone back to Jessops where I bought it from and explain to them and try for an upgrade as the unit was faulty, This I did and without any fuss whatsoever they agreed to upgrade me to the advanced , and by the time it arrived the shop I also got it at the DJI sale price ! I have got to say Jessops costumer service was brilliant as is my new advanced, I had zero confidence in its ability but met up with the guy I met in here and he showed me what it can do ! One word awesome , had two amazing flights