I bought it at the urging of a certain ol' pal o' mine, whose opinions I trust. The plugin does indeed do just what he said it would do. And it's fairly unique; I have nothing else in my toolbox that does quite the same thing.
However, in actual practice it gets very little use. And not because I don't try it - I do give it a go on most drum tracks and busses, even occasionally on full mixes. But 99 times out of 100, it doesn't help. Or makes things worse.
I've also tried to use it as a transient softener rather than enhancer, with about the same success rate.
I'm glad I have it, because I have nothing else that does exactly the same thing. I'm a fan of Mr. Pensado, but I don't trust his testimonials because some are paid endorsements and he doesn't say which ones.