Zaino is porimarily a sealant and not a wax. Its chemical makeup allows for a long lasting but many (including me) belive its almost dead looking.
I personally prefer a good quality sealant (zaino is fine but overpriced and the owners a bit taken with himself) followed by layers of Carnuba such as Zymol, Ps21, Pinnacle Soveran, Chemical Guys 50/50 etc. This gives a much "wetter" look to the paint with much more depth.
Zaino has almost a cult following and I personally believe its overrated.
Some great detailing sites to learn are:
http://www.autogeekonline.net/ http://autopia.org/forum/ http://meguiarsonline.com/Default.aspx