Both of my Iris+ machines flew right out of the box. My first one got a little messed up when I started "playing" with some of the hundreds and hundreds of adjustable parameters, so I re-loaded the stock Iris+ parameters with Mission Planner, and got it back to stock out of the box. Then I bought a second Iris+ to "play" with. I did the "autotune", and it works very well, but you have to have some open space, to let it do it's thing. I found autotune raised my PID's quite a bit, and I wound up pulling the roll rate down some, as I have a quivering right thumb! Still haven't got up the nerve to try any auto missions yet, but coming soon. I have a few sets of 10" props at the post office to try on my Iris+, and a knock off APM 2.6 that I'm going to put into a new F450, and play some more.