I have the older model G-tech that reads 0-60, 1/4 mile ET and trap speed and g-force. It does not pick up RPM or do a HP calculation like the G-tech Pro. The HP calculation is back-calculated from the acceleration based on a user input of vehicle weight and thus will be even less accurate than the times/MPH.
If all you really want is the 0-60 and 1/4 mile times I suspect the Pro will work fine even without RPM - anyone own one and know for sure?