It works, it really works.
I am a musician first, producer second. That means that I will often use a sound that I really like despite it being noisy or hissy.
I have a track thats a very simple, sparse instrument that sounds perfect to my ears. It has a beautiful, organic, simple, original and inspiring tonality. I got very into it. A few days later, over the initial excitement (end of a musical honeymoon, you could say) I noticed it was so damn hissy-hummy. No longer did it sound rocknroll, it just sounded irritatingly noisy. I went through the options on Sweetwater and came across this plugin - its cheaper than the competition and had good reviews.
It fixed the track, absolutely. I was so pleased. There is a bit of a subtle tonal effect, which you can minimise by playing with the controls a bit, but it is there. It is subtle enough that you will never think of it after the first notice - every time you open up the project you just get on with the music. Its also quick.