I have my hair professionally colored, and I use Overtone to keep the color bright and vibrant. Yes, it totally works, smells great, etc - but my favorite thing about it is the value. Getting my hair done at the salon is really expensive, and using Overtone has allowed me to DOUBLE the time I wait between professional touch-ups. Sure, $18 may seem like a lot to pay for 8oz of conditioner, but it beats the HECK out of spending $80-100 at the salon!
Plus, it really, really works. Last time I went in to the salon, my colorist said that my hair looked so good that she was surprised I was coming in for an appointment!