my gtech, the older one, is pretty damn cool if you have realistic expectations of accuracy..
the thing about the wheel hp function is you really have to be close to the cars exact weight as run, otherwise itll be way off.
my dynasty gets between 130-137 whp. crank rating is 150.
1/4 mile times arent more than a tenth off, though the mph always seems to be 2-3 mph high, EVERY time. at least its consistent, so i can just subtract 2 every time
oh yeh and its VERY consistent between back to back runs.
anyway the new one is just awesome, i wouldnt doubt the thing for a second based on my old clunkers performance.