I tried it for fun, and while I agree that software like this can never replace good ears of an experienced mastering engineer, AAMS did a better job than I had expected, has quite a few tweakable parameters, and can even be used in a sort of hybridized fashion by disabling some or all of the automated features. As much as I hate to say it since I do some mastering work, this may be a great product for the "weekend warrior" musician/engineer who wants a quick "finessing" before offering their newest tunes to a friend or at a party. And now that it is free/donationware, it may entice more people than ever to not pay for better mastering until they think they are ready. I know that this should be a good thing, making it all accessible, but there is a part of me that is afraid that software like this, while being ok, it may also lower the standards for some people of what is "finished". Once people are convinced that what these software's do is "mastering", then the desire for a better job can be diminished..... Or am I just being paranoid and self-serving.....? Anyway, it did a better job than I had expected, and for some reason this bothers me...lol.