I used it (Antares A.T.) on a track a couple years ago - Label flew the band out from NY (to me in Chicago). Vocalist had a bit of a cold and screwed the pooch on one song. Couldn't do it again - Couldn't stay longer - They had to get back to NY. Tried to correct it for days...
Finally threw the AutoTune on it and cranked it up to "STOOPID." Way beyond Cher. Hard-jumps from note to note - Totally obnoxious.
Saved my ass. Band loved it. Label loved it. I even thought it was kinda cool. But for sure, nothing I'd actually "try" to do...