I did use most of their products for years. Speed Shine, Best of Show Wax, Wheel Cleaner, Glass Cleaner, Car Wash, Interior Cleaner........all good stuff.
They also offer many high end specialty products I have not found anywhere else.
But after finding Adams Car Care Products here on DC, I've completely converted. There really is no comparison. Adams products are easier to work with and work better (smell better too!). Adams also has much better customer service than what I have encountered at Griots.
Just my .02.