I own both
SGII and UG. I prefer the UG for value, ease of setup, and appearance. The only area where I'd recommend the
SG is if you own a hybrid, or have a need (and know the xgauge programming parameters) to display custom data, such as transmission temperature, high voltage battery pack voltage/temperature, etc.
The average driver will likely find the UG will meet their needs at a fraction of the cost.