If you want an impartial assessment, do a search for GuruReports, or get their information from the Zaino site, and order their report.
They do a "consumer reports" type of assessment on 46 different waxes and polishes. Some of the other products recommended on this site did very poorly in the tests for shine and/or longevity.
The only knock I've ever heard about Zaino is the work involved to bring the truck to an acceptable condition to begin using the product. Once you get to ground zero, it's incredibly quick and easy. By far the best product I've used in the last 40 years.
The start up may be a bit of a pain, but if your SSR isn't worth spending a couple of hours with a claybar to get an unbelievably smooth surface, some of the other products may be more suitable.
If you have any areas that need buffing, and are afraid to use a rotary buffer (don't blame you - they are notorious for burning paint if you don't exercise a great deal of care) I would strongly recomment the Porter Cable random orbit buffer - excellent tool.