Headunit Installation was easy into the existing cigarette lighter holes of each car. It was much more difficult to remove the factory-installed cigarette lighter socket in both cars. (They protect these things really well.) Fast charging works well. I want it to sit flush but leave a small gap for the ring on the lid instead. I have not used the cover in any of my apps. After installation it's not noticeable at all, only I know it's there, so not worth deducting a star. Overall a great product that I would recommend.