I've been using Uber for about a year in various Latin American countries, and while it started out great — no negotiations with scammer taxi drivers — the service seems to be declining rapidly. I've been overcharged on a bunch of recent trips, from bogus cancellation fees to bogus add-on tolls to the meter not being turned off until 15 miles after I was dropped off. (And scams aside, not tipping will get you a 4 rating, at best.) Anyone using Uber in Latin America, especially as a non-Latino, is advised to watch your charges very closely.