I have tried Ogilvie Straightner which works well...but i should warn you that it is possible that the unit may start to shed faster than normal...the product is not suppose to be used on chemically treated hair ...But the bottom line is does work. You will have to keep it conditioned well after the process as your hair will have a tendency to be somewhat dry. I f you need more answers you might email Debbie our resident hair wizard...she won't give you bad information she knows her stuff. Cheers