Admittedly only 3 burns, but comparing to HS0K and HS0P, it's amazing!
Still too high for perfect though.
But results are FREAKING AMAZING!
***** Update *****
After scanning a bunch of DVD+/-R burnt with other firmwares, it (HSG8) does appear to burn better, AND scan previously burnt DVD+/-R better. Spikes present in previous burnt media are still present, but tend to be more severe for high values, and less severe for lower values. (weird eh?)