I guess the right polish/wax to use is the one you are happy with.
I like the Meguiars because it's easy to apply and buff with fantastic (well it pleases me) results.
It doesn't leave any dust in the crevices and you can apply it to the black mouldings/window surrounds with no white marks spoiling the finish. Many polishes/waxes say keep it off the trim.
It can also be applied in the sun. Many polishes/waxes say don't apply in direct sun.
There are many far better polishes and waxes but they usually cost a lot more. I've tried so many different types after more than 50 years of cleaning and waxing and Meguiar's does seem just about the best for me.
Here's my wife's 206. It will be 13 next month. I 'Meguiared' it on Sunday.