Scalp Pigmentation

I shave my hair to cover up my baldness, I have stumbled on to scalp pigmentation this to me looks a very good option for some one who rejects propecia.

What are everyones thoughts on having the procedure done?

A waste of money I think. They say they only last a couple of years. So you have to do it again and again. I think it's a stupid idea that should never have taken off. Better off just shaving.