I used CarChex to do perform an inspection on a 2001 911 Porsche Turbo as the car was located out of state from where I lived. My decision to purchase the car was based on the findings of the report which all came back with "Excellent" ratings on the car. Let me just say that their definition of "Excellent" is completely different than anybody elses, the car required over $7000 in repairs that were not mentioned in their report. When I received the car the drivers window was not workinh, the rear spoiler was not working, the tires brands and tire sizes were different than those in the report, two of the wheels were bent so badly that they needed to be replaced, the cooling system had leaks and the radiators needed to be replaced, the dash board leather was in bad shape, etc -- you get the point.
Clearly their inspectors are either incompetent, blind, or are on the take receiving bribes from the car sellers to have the car "pass" the report -- or maybe a combination of all three.
Bottom line -- do not do business with these guys!!!