Driving a hot car in the middle of summer is miserable. Ceramic tinting blocks out the sun, keeps your interior from fading, and makes the AC work way less. It is a one-time cost that makes every drive more comfortable.
You can usually find a better deal in early spring before the shops get slammed with summer work. If you plan to spend about $600, you can use the Discover it® Cash Back to manage the cost over time.
The 0% intro APR period is a deadline, not a gift. If you still have a balance on the card after the 15 months end, you will be charged interest on the remaining amount.