second or two to respond so flare an be a problem. The user interface is slim, too. I have not wasted time trying it on stills, but it's great for video. I have never seriously used the internal battery either; I run it from a 5V regulator off the main flight pack.
I have taken loads of videos with it and within the limits outlined above it is fantastic. It was designed specifically for groups such as modellers, and it handles fast changes of direction well. Better than my Panasonic, which cost four times as much. It is possible that this is just a set-up issue with the latter, more experimentation is needed here.