Uber just recently added an option to book a taxi and the rate usually shows cheaper than the regular price. Every time I attempted to book it, it was unavailable due to a "busy time". Everytime ia a busy time. What is the point? It only wastes my time waiting for a taxi for 10+ minutes to end up booking regular Uber fair anyway. If the app shows that there is a driver available within reach, it should be available. Never the case. I am getting disappointed over and over again. And there is no option to leave a review on the app, it's a mission impossible, yet they don't hesitate to charge the credit card right away. Uber really needs to figure out better system and customer service.