Around 11 years ago, I started using Zaino, never looked back. I wash the cars/RV once a year with Dawn, to cut the grime and any wax. Clay bar or polish the areas that require more. Then on the cars, use Z2 or Z5 depending on the color and condition of the paint. On the RV, I use ZCS. The neat thing about ZCS, is you wipe on, but never wipe off. (Wax On - No Wax Off).
Just walk away. Saves that last buffing step to remove the dry wax, much better then the many 'Wash as you dry' products. Has very good UV blocker too.
Wax is like oil, everyone has what 'works for them' - and thus 'Must be the Best!'
I like the protection, and ease of application. I also use Zaino ZCS on windows, it's like Rain X on steriods.
Have fun, be safe,