I used to use Zaino, and at the time (13 years ago?) was very happy with the results! This of course was before I knew what swirl marks/ect were and used a regular cotton towel to wash using 1 bucket. When I started to read more about detailing and learning a whole lot more, I realized Zaino (as good as it is) wasn't the correct line of products for me. I wanted to move onto machine detailing my car, and had to find a product line to match, and am very glad I found Adams.
Are there better and cheaper products out there? Yes. However, I have no issue with spending my money towards a company that seriously might have the best customer service I've ever encountered, along with providing a top-notch product. It also doesn't hurt that Adam's has chosen and sticks to their "USA made" morals. While I may not follow that stance in my personal life, I'll happily endorse a company that does.
I don't see how you couldn't be happy with Adam's results. And as stated they'll refund your money 100%.