I have really frizzy boofy hair to. I had the keratin straightening done a few months ago because I was sick of using the straightener all the time. It's been a few months and I can still just wash my hair and let it air dry and it stays nice and smooth and lovely. People have varying results with it, but for me it was well and truly worth it! My hairdresser charges $99, including the cut, so it wasn't a huge risk if it didn't work.