Last night I used Zotos AGE Beautiful Haircolor in Clear Shine. Its actually a demi permanent so I was a little nervous. There is a BOGO at Sally's so purchased two boxes (tubes) with the developer. I actually needed both tubes so I'm glad I got both.
I followed the instructions to a tee, applied it to my hair while dry and shampooed and DCed after 20 minutes as if it was a hair color.
I don't notice much shine (my hair is generally pretty shiny anyway), but it was so much easier to detangle and it feel so much softer the next day. Some of the roughness I feel on my crown is gone for the time being. I think it will last as much as a regular color demi would.