Zaino is a great product, although i havent personally used it....i have seen and heard quality testimonials about it.
B/c its synthetic the protection is long lasting and durable. Also, the majority of the protectants/solutions are clear (not white/cloudy like typical wax) so you can worry less about damaging truimming/molding.
However, in my opinion there are some major drawbacks regarding Zaino, especially if you Detail cars as a business.
Somedrawbacks:
1) Zaino is significantly more expensive than other premium detailing products
2) Zaino application (the complete Zaino process) is very lengthy, and requires 'cure times' between coates...i wouldnt say its complicated, its just very time consuming.