Um, well Zaino was most recently, named #1 by The Wax Test and Guru Reports who tested 46 waxes.
www.gurureports.org. Are you using the whole system or just the Z2? I recommend the ZFX (which will cut the drying time in half--about 30 minutes) with the Z2, the finish with Z6 spray (I also use this to "touch up" as ness.)
AZ Outlaws:
Check out
www.zainostore.com they have all of the info and tons of testimonials. The products I find are far superior to anything on the market for shine (no matter what color car you have) and the protection is incredible. I have not "waxed" mine in about 3 months, and water won't even stay on for two seconds--just slides right off. Now of course like anything else, you will get a million different opinions. However, I know once people acutally use the Zaino, they never go back. My black literally now looks as though you can stick you hand through it--that's how deep the shine is...