Originally posted by Jakethesnake
I used to use one with my ws6..was .15 faster...dead one every time at the track so 
keep running sticky, i got your back homie!
i agree.. the ET was always close for me.. MPH was usually off a bit though.
the newer ones are supposed to be even more accurate... a number of magazines have done back to back (ie used it at the drag strip) and gotten within .1 and 2 MPH every time.