Terminal one excellent throughout. I can see why this is a five-star airport. It only took me 7 minutes to get from the plane door to duty free make one purchase clear passport control get luggage and clear customs. Excellent speed and efficiency all over. Staff are multilingual. Singapore has four official languages. Outside customs plenty of payphones food / convenience store / tourism center. Taxi rank is very good and prompt. They charge exactly by the meter. Also available are Mercedes for rent (minimum 50 Sing Dollars). Toilets were clean! Plenty of food choices - more than I could list. Extensive duty free / shopping. Independent security check for each gate which increases efficiency.