Brazilian Blowout For Black Hair Has Anybody Had A Brazilian Blowout?

Has anybody had a Brazilian Blowout? - brazilian blowout for black hair

I learned, and I wonder whether it is legitimate or just another scam.
Has anyone who had them done to your hair? Is it money?
My hair is long, half-way in the back, undulating course, no waves (very good). They generally spend a lot of time to straighten curly hair and then.
If anyone has this, I recommend?

Thank you!