Is permanent makeup a disastrous idea?

I was looking at a friend’s tattoo site, and saw that one of the guys at his shop does permanent makeup – eyebrows, eyeliner, beauty marks, lip color, etc. Google turned up a lot of places offering to provide this service, but not very much detail involving real-world people getting it done and their experiences (besides old ladies and chemo recipients getting fake brows drawn on, which I think is fabulous. Some of them look pretty real).

Do you know anyone with permanent makeup inked on their face? Did it help them achieve whatever look they wanted, or was it a very expensive beauty blunder?