It's pretty good, but it takes some tweaking. You have to make several passes using the different settings to see which one will work best for you. And that depends on what computer specs are, how off the note is. It's fairly seamless, and unlike AutoTune, you can't really hear it attacking, but it all depends on what you are trying to do with it. It can't make magic, but for the occasional bad note, it will work. Vocal ticks, throat clearing, the old 'frog in the throat', it won't fix.