Hello all. I have just bought a Hubsan H501S-S. I thought it was an H501S but have since found out it's an S-S which I believe is better but who knows. What can I say. I love it. Lots of replacement Li-Po batteries on order already plus a range extender kit. Slowly but surely I have been testing its limitations and so far have take it 100 metres away at a height of 50 metres with no problems at all. The RTH function is amazing, always landing withing a few feet of where it took off from. I was even brave enough to fly it 100 metres away, then turn off the transmitter and put it on teh ground in front of me and watch in amazement (after a few seconds of pure fear) as it turned and flew back to me, again, self landing gently a few feet from where it took off. I'm seriously impressed with this. I had an issue initially with the 1080p HD recordings but Hubsan support were brilliant and explained how the SD card formatting requirements for the H501S-S were slightly different than those for an H501S. Once reformatted correctly, pictures and videos were amazing, sample shown here.