The Runcam HD2 tends to produce HD recorded video that is a little over-saturated and a shade over-exposed but this tendency is dramatically worse when using the live video output.
I'm sure that Runcam will be able to fix this in a firmware update but this pre-release version is definitely disappointing in that regard.
On a more positive note however, the latency is acceptably low - which makes FPV flying a pleasure -- if your eyes don't get burnt out by the bright greens and blown-out highlights :-)