Talking about stability, how about this?
First and foremost, I have nothing to do with 3DR but is regular customer.
I order the Iris on Nov 2013 and just received it last week. After a few flights with it, I think the waiting time is well worth of it and we have a winner here.
The Iris simply lift off and settle in a VERY stable hover on my first flight in Alt hold mode. after flying for a few minutes I switch to loiter mode and it hold position and altitude well. left and right pirouette are also very good. Unlike DJI Phantom, it simply spin on the spot while the DJI will wonder in a radius about 2 meter when perform the same maneuvers.
I also try a few auto mission and the default setting is just fine. Navigation is good which track the grid line very well. Until now, I have not touch a single thing in the parameter list. I am really appreciate all the hard work done by the developers and the beta testers. Now we just enjoy flying it without any hassle.
The Iris package is also truly ready to fly. If you have a/c power source at your flying field, you simply install the propeller, install transmitter battery and charge the included 3S Lipo battery with the included charger, an hour or so you can have your maiden flight with it.
So far my Iris will fly about 13 minutes before the LED light flashing. Flying distance is about 3 KM without load. With a Gopro Hero 3 in front, I have flown 1.7 KM with plenty of reserve. I think 2 KM is well within it's range.
I will bring the Iris as my back up unit to Medan, Indonesia tomorrow for a Al Jazeera documentary video shooting by Banyak films, UK. If the Iris appear on TV, I may contact Chris for some advertisement appearance fees.........well, just kidding.
Anyway, I'll highly recommend anyone who want to try multi rotor with mission planing capability, you will not disappoint with the new Iris.