Im a frequent user of uber cabs. From my experience most of the cars I traveled in were well maintained. The uber app has a good interface as well. The drivers are experienced and have quite some knowledge about the roads in the city. Mainly uber cabs are comparatively cheaper than ola cabs. Also uber does not have any code that is to be show to the driver before the journey unlike ola so that makes it more hassle free. The availability of cabs are good enough. They also have a range of type of cars you can choose from according to your convenience.