I disagree with the above comments from my friends about trusting the computer check for the cars.so far there has been no machine built to check engine or transmission(Gear) of a car from inside.the computer check only shows how the censores of engine or gear are working and how the emission and output of engine, and shifting of gear is working.computers are just capable of checking electronic parts of engine,not the engine from inside.i know a guy who had his car engine completly gone & the car gave alot of black smoke,the company gave him a big estimate for repairing the engine and after that he just did some oil treatment & took it for selling.he found a customer & they both went to a computer checking place.there was no problem with the engine in that computer report & he sold his car.i know its cheating but i just came to know abt it from some one.alot of cases happen like this daily.the guys working in computer checking shops have no experience and secondly u can always see new faces there.and if you replace your car parts with genuine parts even after a big accident these paople can't tell you whether the car is accident free or not.i don't believe in paying 300 for my satisfaction and later if they tell you that there is a problem then you leave the car and ur 300QR went useless..