Well, I did; demoed and bought it a few days ago. Here are my FIRST IMPRESSIONS:
Things, I like:
It can be used in an unobtrusive manner because
1) It doesn't affect the ends of the spectrum, which I consider a big plus (all other similar solutions, I tried, e.g. "Gullfoss" and "Teote" often tend to boost bass and especially highs to an unlistenable extent, IMO).
2) The large set of EQ profiles let you pick one, that is close to what you already have.
3) You're offered controls for all of the changes, that algorithm suggests.
Another big plus for me is that it can be used as a "target acquisition device"; by that I mean, you can make your mix sound as good as possible with the plugin, and then implement the changes on the mix level in such a way, as to minimize the processing, applied by the plugin. It is made possible by the extensive monitoring options, provided by the plugin, (like delta-monitoring for every band).
Unfortunately, there's a problem, that makes this workflow very tedious. I will describe it below.
Things, I do not like:
1) My biggest gripe is with the "Analyze"/"Reanalyze" functions: in my experience, unless you feed the algorithm with EXACTLY the same material (up to fractions of a second) it can result in DRASTICALLY different suggestions (up to 80% per band). Speaking in software terms, it makes the algorithm both opinionated and non-deterministic. In practice it forced me to reanalyze a song from start to finish after every change in a mix. (I even tried to play a song at double speed, which seemingly didn't change the outcome much). It is still not clear to me, whether there's any reason to stop analysis at all (by pressing the "Analyze" button a second time).
Admittedly, all this is not an issue, if you intend on using this plugin at the very end of the process, when no further changes would be made "upstream".
2) My second and much smaller issue is with border frequencies for the bands. This is purely a UI issue. Currently the frequencies are displayed in such a small font, that in order for me to read them, I have to press my nose against the screen and it leaves smudges. I think those frequencies should be overlayed over the bands visualization in a larger font.
Sorry for such a long-winded post.