I had a sample of it and it was a good quality shampoo. Good-average lubricity, good cleaning. It is a gloss enhancing shampoo but to be honest, the time I used it was on a freshly waxes vehicle and noticed no difference. I am not sure about the dilution ratio so maybe price per wash would be something to consider.
I have used a complete bottle of it. I agree with Doc. Above average lubricity, good cleaning, etc. I didn't know any difference with the "gloss enhancers".