I have now had approx 20 flights on mine and it gets better and better every flight. Have the Demon Cortex Pro fitted and running 35% gain which smooths everything out very well especially on landing approach. I have it enabled in normal mode only from take off to landing and it has made a huge difference. I can not fault the model and it flies superbly (just the pilot needs to improve!!) I never use flaps for landing but might experiment with the speed brakes next time out just for an added bit of realism.
With the PBS TJ20 fitted I have the timer set at 8mins and always have plenty left in the tanks which gives confidence should I ever need to overshoot or hold off landing for any other reason.