I do use Lexol products for the interior: the leather cleaner and conditioner, as well as their vinylex vinyl cleaner/polisher. And, while Zymol makes some excellent products, they're extremely overpriced. Check out http://www.carcareonline.com. They're a very knowledgable group, and sell all this stuff. They know the products well, and from my experience--and others' opinions I've read--their recommendations are right on. They have good how-to articles, and their product descriptions are candid about which products they like the best. You can get as good--or better--than Zymol results, while spending a fraction.