https://www.yahoo.com/lifestyle/singapore-airport-just-named-world-162000585.html
I passed through that airport a couple of years ago, and I absolutely believe it is the world's best.
The airport had great facilities, including 100+ computers with internet for use by passengers free of charge.
The underground highway system in Singapore is fabulous, and very fast to drive through. My cab made really good time from the cruise terminal to the airport. Very clean city, very low crime (there are large signs everywhere announcing drug peddlers get automatic death sentence), but the best part is food! Chinese, Indian and Arabic restaurants are wonderful. Unemployment rate is near zero. Only people without jobs are those are in between jobs. There is no unemployment checks which encourages everyone to work I am guessing. And everyone speaks English! This is a visibly prosperous city. Our tour guide said every 6th Singapore citizen is a millionaire. 1/3 of work force is foreigners on temporary work visa's. The Buddhists, Hindu's & Muslims get along without any skirmishes or terrorism.