Here is my personal perspective on this topic.
Let me preface my response by saying that I'm NOT obsessive-compulsive about getting the best shine possible on a car. Rather, my goal is to protect the NSX's paint from sun and grit as well as possible without spending days getting it that way.
In the past I've used mostly carnauba waxes on my cars, most of which performed moderately well but all of which seemd to wear off quickly. In addition, when applying the wax, getting it on anything other than just the paint or chrome (e.g., the molding, plastic, etc.) resulted in hours of effort with a toothbrush trying to remove the resulting white paste from the non-painted surfaces.
Then I discovered Zaino (Z-2 Pro with the ZFX additive) and the results were stunning. First, I found it MUCH EASIER to apply than wax. Wash the car well, dry it, and that's all the prep that I need. You can apply Zaino to every surface on the car -- plastic, molding, glass - whatever -- and it will dry clear and is easy to buff off by hand. Multiple coats only improve the protective qualities and are very easy to apply over the previous coat.
The protective qualities are amazing. One time just a few days after I had applied Zaino I noticed some fresh bird droppings on the hood. I planned to clean it off when I got home, but on the drive home, the bird droppings literally slid off the car and I couldn't locate it when I got home. I find that I only need to apply it two, or at most three times a year.
It is true that a high quality wax will give a better shine than just using Zaino, but if you want the shine, just apply wax over the Zaino. While there may be treatments that are even more effective than Zaino, for me it's just not worth the effort since Zaino is much simpler and quicker than any wax I've ever used.
One more caveat: I started using Zaino on brand new cars, within a few days after purchasing the cars. I've read that, for older cars, a lot more prep is necessary. This may be true, but if your car's paint is in good shape, I doubt that you'll need to do more prep than just a thorough wash (and maybe a clay bar).