since buying my crossfire and joining this forum i have read so many times how hard it is to dyno our cars due to sensors controlling the esp traction controll etc.

so while hunting around the web i came across this...
http://www.google.co.uk/aclk?sa=l&ai...jWCTnIq3eol7aA

it is supposed to be really quite accurate and gives you (after inputting your cars weight) hp both max and average, 0-60 times, standing 1/4 times and tells you how many g's you are pulling around a corner

i have looked on a number of forums for reviews etc. and this little gizmo really is quite accurate.
normally retailing at about $200 i searched on ebay and found it for $50!!! anyway ive bought one.

has anyone here used one???