I want to have this Japanese straightening treatment but I don't like the very straight look especially at the end, I want the strand to be straight but not the whole look I want it with soft big waves, is it possible to do that or it has to be dead straight with this treatment , I mean can the hair dresser use curing iron instead of flattening iron, because flattening iron gives that dead straight look which I don't want, I rather have big waves and I can have the straight look when I want to at home. I've heard bad things (hair loss) about it and good things (makes the hair very shiny healthy looking). How to get this treatment with minimum damage? What is the best product to ask the hair dresser to use on my hair, I've heard of Lisc (not sure if this is the right name) and yuko. How much does it cost?