Artists use this
Not great but unique.
There are much better auto-tune programs like Antares Auto-Tune, but Gsnap produces a sound that is technically auto-tune, but sounds so unique and weird. It's hard to explain, but it sounds like a much different auto-tune than what you hear on most records. If you're sick of the regular auto-tune and want something more unique and quirky, I'd recommend it. But on the other hand it's also very basic and limited.