I bought the Amazon Keratin Kit as recommended on here, and it worked beautifully, but only lasted about six weeks. I have enough left for another go, though, so I'm hoping it lasts a bit longer this time.
I used the brazillian straightening kit off amazon, recommended on here. It is the business. Changed my life. Hair not poker straight but it got rid of the frizz and my hair is in the best condition ever. Dont know what the concerns are about the blow out, but my hair has gone from straw to totally swishy using this kit.