After working with AAMS on and off for a couple weeks, I've found it to be fairly useful in its spectrum analysis. I wouldn't let it auto master anything, as the results were usually pretty bad. However, I had it do the analysis on a mix that sounded pretty good, but wasn't quite there yet. Rather than just letting it do the mastering, I went back to the mix and applied some of the changes to individual tracks from the spectogram after analysis. This has made a substantial improvement to the mix. It's not quite pro yet, but it's a lot closer than it was a week ago. It certainly pointed out some frequency things that were problematic that I wasn't catching. I also had it analyze a few different commercially released songs to compare the spectra.
In the same genre, it was surprising how similar most were. There were certainly some differences, as we would expect, but not as many as I would have thought. Given that there are differences, I'd suggest adjusting the frequency balance of the mix according to the spectogram, then make the mix sound good again by ear. Great learning tool for a mix, and later on master that improved mix from learing tool AAMS and make the final master with AAMS.