For solo gigs, I rely on the Tyros harmonizer quite a bit. It does take practice and I've modified four harmonies that I keep in user files, that I use.
The harmonizer doesn't take the place of real harmonies, that's why when my wife and I sing together, we don't use it.
But for my solo gigs, the harmonizer adds a bit and makes the song more interesting for the audience. At least that's the feedback I get.
My wife can't use the harmonizer as she belts out songs and over drives the harmonizer. But we don't like to use the harmonizer anyway when we do our duet.
It’s all about the learning