The first time i ever used Uber was in Lisbon last month. I had the account set up but was always hesitant in using it. After using it for the entire trip in Lisbon, i am now officially hooked. No cash, no tips, no need to speak the language. Just enter your coordinates and desired destination (no need to fumble with the language or showing the driver the address on a scribbled piece of paper) and the app tells you exactly when to expect a driver. Much easier than queuing for taxis or looking for a taxi stand. Plus, the receipts are available online and no need to deal with the hassle of keeping those paper copies for expense reports. I hope it becomes more universally used.