I heard about Optimum Polymer Technologies from assorted YouTube videos and so I purchased several products including Opti-Seal, Optimum Car Wash (which smells TERRIFIC and leaves ZERO residue!), Optimum Spray Wax , ONR and the Big Red Sponge. So far I've used only the car wash and Opti-Seal, but I'm thoroughly impressed. I purchased a new 2017 Accord EX-L V-6 w/manual trans about six months ago, and I want to do what I can to keep her looking great all her life.
The very positive reviews on OPT products persuaded me to start investing in a maintenance arsenal for the Accord.