No, I haven't. I thought about trying it, but after hearing that it has protein condish and not so much a moisturizing condish I changed my mind. My hair breaks a lot so I'm focused on moisture right now. Maybe we have some ladies here who has hair that LOVES protein. I don't know if your hair loves protein or not so you might wanna be sure that leaving it in won't do more harm than good. I wouldn't want you to be set back by it. It sucks trying to get healthy hair w/o set backs.