I like Meguires too.

It is easy to apply a single coat of liquid wax and be impressed. Considering how little work it takes, there products are very, very impressive.

But all of Meguires waxing products also contain polishes, so adding coats never improves the look of the wax job. This is where Zymol and P12S come in ... you can layer the stuff on.

I spent three days on my car once. My process went something like this:

Wash & Dry
Wash and Dry Again
Polish
Clay
Polish touch up
Seal
Wax (day 1)
Wax (day 2)
Wax (day 3)

Using the package provided by Autopia for the "Ultimate Finish" with a nice rotary buffer provided the best looking results I have ever seen in person. It was incredible shine, depth, color and smoothness.

Time dictates product for me. I still love Meguires.