I used to only use Meguiars until I tried Wizard's products. They are simply amazing. Of note, in my experience, their Black Renew will bring any color plastic back to life and last. The Tire & Vinyl Shine lasts longer and is not greasy like Meguiars Shine. Finally, Shine Master, the wax alternative is like a hand glaze with a good coat of number 26 over top all in one step. I use the Mist-N-Shine to keep my detail job up. I have not washed my truck in over a month, and it looks as good as the day I detailed it.
I should note that I use a Mild or Medium 3M detailing clay to remove all tar, oxidation, and other road grime prior to sealing with Shine master. If your vehicle is really bad wash with Simple Green first, then clay, then wash, dry, and wax. If you do it right, maintaining the look is quick and easy.
Here is a "How-To Use"
link for the Wizard's product line.