Meguiars makes a great product, and is probably one of the best "commercially produced" products on the market. I have had great success with their products, from exterior waxs, detail spray, compound, and clay bars, interior leather and dash board products, to tires and engine detail, as well as their black plastic treatments. I have been very satisfied and find the price point is unbeatable.
Many people stand by Chemical Guys products, as well as Adam's Polishes.
I believe in once I find a product that works well for my needs, I stick with it. I also look at ease of use for a novice detailer.
You may want to ask to join our club Facebook Group page as it gets much more attention then the forum here on the website. The link to the FB group page is
https://www.facebook.com/groups/MustangClubMD/ Also please feel free to share pictures of the results of the products that you used.