Feige and Custard are basically on the same level, both are pretty good. When installing a navigation system specifically for a special car, first of all, you need to check the brand. In fact, the most important thing is to check with the dealer. If you just find a small shop to install it, it is better to buy that kind of off-brand one, because their construction and after-sales service are very good. There is no guarantee. If you want to install a branded navigation, it is recommended to go to a large national chain store to install it, so that after-sales and quality are guaranteed! The service quality will also be very good!