WG is currently my product of choice, Im a big fan of Polymers. I believe they provide stunning clarity, depth, and all around visual satisfaction, as well as unsurpassed durability. I feel two consecutive layers applied 24 hrs apart is the hot ticket ! I have never used zaino but have read many , many threads concerning its lack of "bite". Ive used Blackfire, Platinum, Wizards, Klasse, Rightlook, and many others, WG and Blackfire are my fav's......The problem with NXT, and Im now familiar with it (I attended a NXT class at Meguiars last wknd), is it has very very minimal cleaning properties. so that still leaves you with a surface that needs to be properly prep'd. I really think you need to lightly polish any surface before adding NXT.......Its a great product other than that......Nice shine, feels slick, and is Meg's longest lasting product....