A year or two ago I tried out Waze and it happened to be eastern. One could collect eastern eggs by driving certain routes and we thought it was fun. The next week we were disappointed when there was nothing to collect, and I forgot all about it..
When we visit the Infinity Loop last week, the friend who invited us there checked it out to recommend a route back to SF (on his iPhone, obviously). I used it on the Android tablet en route and we avoided all the traffic jams.
The other late evening when we arrived back to Helsinki, I was expecting the usual at the taxi stand; a typical finnish taxi driver who hardly speaks, throws the luggage into the trunk of his few months old E-class Mercedes Benz and knows where our home street is. He doesn't say a word unless we start the discussion, if there's a silence for a few minutes he'll turn on the radio. (They do have a navigation with pretty damn good navigation on the taxi order/information system, I've always envied it compared to the Garmins, TomToms and phone nav apps.)
Instead we got a driver from Algeria, who was pretty welcoming and talkative. He had a 10" tablet attached to the middle console and had Waze running on it. It was still a few months old E-class Mercedes Benz and he did know where our home street was without the map (he had lived here 17 years already and one has to know a lot of streets to get a taxi permit). He used Waze to avoid traffic jams and mobile speeding cameras, and to show foreign customers where their hotel is, what's nearby, etc.
The rest was the usual, no tips, you pay the exact amount to the cent and credit/debit card payment is the standard (there's no line for tip).