Some people have asked me to upload an unstabilized video of my OMP M2 FPV setup flying in average weather conditions. Here it comes. I have done zero post editing except adding some music in Youtube Editor (there is no mic in my heli so the original video is totally silent). I have recently replaced the plastic main blades with a set of stiff CF blades from Bangood. They came a little bit unbalanced but a strip of clear tape did the trick and my heli flies butter smoothly now. Flight time with the new blades, however, is roughly 30 seconds shorter than with the stock blades.
All in all, I would say that the heli is fairly smooth and stable considering its small size and weight and it feels bigger than it actually is.