After experiencing some autofocus issues with a new lens I decided to purchase this application. At first I was very excited, ran through the tests, it indicated that I was -3 and good to go. I ran through the tests 2 more times expecting to get 2 of 3 either the same or close, but really it was all over the place. One test says -3 the next was -16 the next was +4. I then modified the setup to force more sample points and higher autofocus accuracy required as well as doing the test at both f/2.8 and f/4. Again, the results were all over the place.
I then went out and got high quality paper, ensured I was printing at 600 DPI, ran the tests again.... yup all over the place.
Basically, after running through this program on my 24-70 @ 70mm @ 3.5M approx 10 times I have no level of confidence in the results as they are completely not repeatable. Sure it could be my camera, setup, whatever, but basically, it's more like I donated $110.