This would simply translate to the choice between a) using Uber with the driver relying on a navigator unit and possibly driving slow and/or unoptimal routes but with a cheaper price vs. b) traditional taxis that cost more but really know the city. (Or try to get an Uber driver with good ratings for local knowledge, if Uber supports that sort of rankings.)
In a city that has mostly bad taxis, I'd choose Uber. I London I might just not.
In a city that has mostly bad taxis, I'd choose Uber. I London I might just not.