[SentraSE-R]

I own SGII v. 4.15 & UG v. 1.0 (original, not EM). I prefer UG.

SG pluses: programmable/customizable, has performance monitor
SG minuses: expensive, dated appearance, inaccurate*, programmable features very limited and hard/complicated to setup. Only 4 gauges displayable at a time. Must cycle through others 1 at a time to display them.

* SG sometimes drops trip average mpg precipitously, with engine off, key on. I've watched AVG display count down from, say, 24.7 mpg to 17.2 mpg while stopped at a light with my engine off.

UG pluses: modern appearance, more bang for the buck, 18 gauges available on 3 screens, 6 at a time.

UG minuses: not programmable/customizable.

Basically, if you just want to plug-n-play, get the UG. If you want to monitor your transmission temperature, or your hybrid battery pack voltage, and (this is a big if) if the SG knowledge base supports what you want to monitor, get the SG.