Adams has some of the best stuff I've every tried. The price for his stuff is okay but the customer service is second to none, and with the 110% guarantee you cant beat it. I just had to place an order for a few things and one item was on backorder for them, the expected it in by weeks end so they threw it in for free.....not many places operate like that anymore.
As far as quality of products, I own 4 black vehicles and I've never found an easier to use product or better results than I have with these.