My son's girlfriend had it done about a month ago. She is estatic with the results. Her hair is/was curly and long. It would take her forever to get ready, she dried it straight everyday! Yuck! Now she can let it dry naturally or dry it with the hair dryer for a very sleek look. Here it costs about $425.00, but I have a friend that did it after hours at the salon for $150.00. Their system is the Peter Coppola (sp?) one. Her hair is so more healthy now that she is not drying it everyday for an hour. You have to use sulfate free products, she loves the new Loreal line. HTH!
Here's a pic I took of them a week after, she didn't even dry it, just curled the bottom a bit...