Done at the salon and tried other, more expensive brands before but gave this one a chance and am completely sold so I ordered four more to have at least a year going forward! 🤩 It took about 2 hours but incredibly worth it because you don’t have to keep straightening your hair multiple times when the treatment is done like with many other brands, so my hair didn’t get nearly as static as it usually does! Note: colored hair will get lighter but not any regrowth so color the hair a few weeks after the treatment if so.