Has anyone ever heard of or used the product Liquid Keratin? Apparently, it is a temporary straightener. I saw an ad for it in my InStyle mag that came in the mail yesterday. It is sold at Ulta. The starter kit is $69.00 and comes with a 4 oz straightener, and a 1 oz shampoo and conditioner. It is supposed to last about 6 weeks. I have 3c hair and would love to take out some of the curl. Any thoughts? Thanks.