One of the best things auto-calibration systems can do is integrate the subwoofer to the main speakers for you, something most audiophiles have to guess at.
Is Auto Room Correction Right For You? Well, Here You Go...
...covers the fundamental problems rather well...
Part 1:
https://www.youtube.com/watch?v=LcGFpYJNE7A
And Part 2:
https://www.youtube.com/watch?v=aRJJ8XJAT54
Part 1:
https://www.youtube.com/watch?v=LcGFpYJNE7A
And Part 2:
https://www.youtube.com/watch?v=aRJJ8XJAT54