It makes your hair super straight and I depends if you african american or mixed. Mixes hair doesn't puff in the shower but sometimes african americans does
It will straighten it so you will have less volume, it will not make it permanent, it will regrow with the same curl texture as before.
Perms are harsh chemicals. The rob the hair if it's natural Elements. Which is makes the hair silky straight. Having hair silky straight isn't to much of a good thing for African American hair, it's more prone to thinning and being severly damaged. It doesn't matter whether it's a kiddy perm or not . The chemicals are just as harsh.
Perhaps it can give you more controlable hair, there will still be time involved when you wash dry & style it but it should be a bit more controllable