I love fooling around with various products, glazes, polishes, the latest and greatest and all, but i`m getting tired of going to wash my car a week later and having the water pool instead of beading. So far, only Zaino Z5 keeps beading week in, week out while the other products seem dead after 2 weeks. I`m not talking about AIO and SG, because that does last longer. I just did my car last week with a glaze and Final Polish and this week the water sheeted right off while my month old Z5 beaded like crazy. I just went right over the Final Polish with Z1/Z5 and it worked beautifully. Yeah, I appreciate the creamy wet look you can get with other products, but I think i`m going to go with Z5 exclusively - at least on the top sections. The sides take a lot less abuse and other products seem to hold up well. Z1/Z5 also goes on and off real well over AIO and seems to work fine over other synthetics like Glare, UPP and Final Polish.