I like a lot of products. However, I have yet to use a Zaino product that wasn't at the top of it's class, and I have used all the paint care products but the ZAIO... I'm sure that is top notch too. I continue to measure all other products against the Zaino line. Z8 is my absolute favorite. Although, that may change as I continue to monitor CS.
It a addition to what has been said previously about the paint care products, IMHO, Zaino Z16 Tire Gloss is still one of the best. Also, again, IMHO, Zaino Z10 Leather in a bottle is outstanding.
I continue to be impressed with Sal's refusal to rest on his laurels, and continues to improve his product line.