I have visited Dubai. Dubai airport is really very nice attractive and very bussy airport for 24 hour. All checking process and facilities are very good. Dubai airport is Protected with high security. Yes it is the worlds top bussy airport, after every 5 minutes there is a flights go around the world, still staff working calmly & flights comes on time. There check in process is very fast and painless. Bording gates could be easily enough to find. One more thing is its cleanliness is 10/10. Its better airport than other average airports.