It appears to fly well! Mostly because of the Zenmuse. It has it's niggles of course and I find the S800 quite a fragile looking frame, although it's seen many flights since I got it back in April 2013 without a problem, well, one arm failed a month ago in flight but I just landed and replaced the arm. This year I'll likely go for a Droidworx Skyjib X4 (X8 really) as it seems a tough frame and easy to transport.
On forums we only tend to hear from people having problems. I'm sure there's a million people flying successfully with DJI stuff. I saw lots of professional rigs last year and they all had Wookong in them. And lots of pros use Spektrum gear which people (Futaba people mostly) still whine about for some reason.
I also use the GH2 with Flowmotion hack. Such a great little camera ain't it? What gimbal did you use for that flight?