The keratin one absolutely did not straighten my curls. Instead, they shrunk up and perked up like they do with IAGirl's pt. It was almost pt time the first time I used it, and the ends of my hair were almost at bra strap length. First use brought the ends up to just below armpit length. It left my longer layer spiralling at the ends, and gave my shorter layer root curl and volume (something I typically have to work to get). My hair was super soft and shiny too.
CG since 11/2011
2c /3a F /Mii, low porosity

Autumn Products /Routine:
Clarifying: ACV rinses, Suave Professional Men Deep Clean Peppermint
Low Poo: Renpure Luxurious Argan Oil
Co-washes: VO5 Kiwi Lime Squeeze or Strawberries & Cream
RO: VO5 KLS or S&C, Cure Care
LI (if needed): VO5 S&C, VO5 KLS, Cure Care
Stylers: FSG, L'Oreal Studio Clean gel, Tresemme Flawless Curls Bouncy Curls gel
PT: IAGirl's as needed