Outstanding choice.
I installed the same bezel mod. It's a subtle mod, but it brings out the detail in the rear of your Candy Apple Red Mustang. All of the other black bezels are too bulky and bring too much attention to the tail lights. The thin bezels just bring the rear into focus, like putting polish on a car for the final shine. Nice touch. The rear of your car looks visually balanced. When you upgrade your exhaust, it'll be hard not to just say wow.
The stripes, GT500 spoiler, and bezel really make the rear of your GT/CS look good. I like it even more than mine.