My Aunty had it done recently and had to get it done twice as it didn't take the first time very well. She had one of the most frizziest hair I have ever known and it now looks like she has it professionally straighten every day, all she does is wash and let air dry. She lives in Cairns and the humity does not effect it. I think she paid around the $500 mark but the hairdresser did the second treatment for free as the first lot didn't take that well. Can I also add it has taken years off her.
I say go for it!!