I'm an Adam's user.. Zaino was too much process for me, but offers a nice result. I too do some side work detailing... The best advice I can give you is to research the products yourself, and decide what process is best for you..
Here is a link to the epic Zaino vs Adam's thread. Truth of the matter is they (the two products) are apples and oranges in the detailing world... Pick whats best for you, you can PM me as well if you have any questions related to the Adam's line.