I never heard of this, I grabbed a download yesterday and had to try it. Spent most of last night on it in fact. I had mixed results with a variety of bad quality un-mastered mixes of a band I belonged to long ago. Reading the output Word document gives a little insight into the world of Mastering, something I'd never have access to otherwise... I'd put it down to another learning tool. Thanks for the link, I'll throw the devs a few $ asap.
And I agree with Richie, it does a good job.