I have to point out that the brand of product only makes about 10% difference in how the vehicle looks. The rest of looks comes down to what types of products, the order, the techniques used. That's why I have a little different priorities when chosing what to use. I love Zaino. Have a bunch of it, I think 5 bottles of Z2/Z5. That's enough for probably 40 years of waxing/sealing. I don't have the time to use it.
S100 - 20 minutes for the paint claner and 10 for the wax. The only negatives I have are the cleaner leaves a slight residue on black trim and the wax does not repel dust a much as Zaino.
Meguiars has about 15 different waxes, not including polishes, cleaners, and other paint detailing products.. Most are good, some are great, others suck. Don't give into brand-whores.