I'm not a fan of Uber's more toxic leadership personalities and behavior, but I do think it's fair to give them credit: they completely changed what it's like to get around places like Mexico City as a tourist. The licensed cabs are a crap shoot, and particularly late at night you'll get price gouged. Unlicensed cabs can be quite sketch. The existing private car services were all insanely flakey. Now it's low stress and reliable.