There are certainly ways to praise an Uber driver beyond a five-star rating, like basic notes or some cash at the end of the trip. But what if you want to make it patently clear that you liked a particular aspect of your ride? After this week, it'll be easy. Uber is introducing a compliment system that lets you supplement the star rating with a badge that reflects what you liked the most. If drivers are great conversationalists or go out of their way to help unload your bags, you can let them know.