I have had my P3S for one month and love it. However, the RTH always makes me nervous because a couple of weeks ago, I flew at night and the thing never returned home. It crashed into a neighbor's tree instead. I'm not sure why, because I had the altitude set high. The signal went out all of a sudden. Today I got 7,132 feet distance over the Long Island sound using a windsurfer, but video was cutting out way before. I'm seriously considering the DBS or ArgTek mod to improve video, or maybe just selling my P3s and getting the pro.