Brazilian Keratin Treatments

I have been reading up on Brazilian Keratin treatments. I was intrigued because an acquaintance of my sister is struggling with her transition and uses this as a crutch.

This treatment is:

-expensive
-long lasting (compared to traditional relaxers)
-does not guarantee straight hair (smooth relaxed curls)
-just as damaging as traditional relaxers (meaning some have good results and some have bad)
-not regulated by FDA (dangerous as far as shelf life and formula strength)
-contains formaldehyde or a chemical cousin (dangerous when inhaled)
-hair cannot be washed for 3-4 days after treatment
-hair cannot be worn up for 3-4 after treatment
-hair cannot be washed with shampoo containing NaCl

In my opinion, this treatment seems like another version of chemical relaxing not an alternative. I have no personal experience with it because the threads I read were like flashbacks to my relaxing days. The people that endorse it say that their hair is shiny, conditioned and easily blown straight without frizz.

I encourage you to do your own research before believing in the new "miracle straightener".