I do software development for a living, so I am familiar with user interface issues.

The OBD-2 user interface is horrible.

The program may work, and it may even work well, but the user interface is so arcane and difficult to understand, that it really brings the whole program down, to an almost-unusable level.

The guy who wrote this had to be an engineer, who has worked his whole life in a pure engineering environment, and he wrote this program as if he was writing exclusively for engineers. (nothing against engineers--I am one).

But it does work--I've used it to retrieve codes and reset my Check Engine light.

But do not expect it to be intuative.