I don't understand the appeal of Uber unless availability or cleanliness and safety are major issues. They charge a significant premium to regular cabs. In DC I always use Washington Flyer to go to IAD because they always have nice cars and drivers; not sure what Uber would offer that is better. Some of the regular cabs in DC are horrific and now the rates are higher than in Virginia (used to be lower.)

In the US there is this ridiculous service called Lyft or something like that with pink mustaches attached to private cars.