5 star is the minimum to give such Airport. Its one of the best Airport in the whole world. Its so big and when you go to the duty free you will feel you have just enteted a 5 star mall. Excellent work Dubai.
One of the best airport.. sometimes you need to wait in big queue for accessing restroom in terminals. Lot of options for shopping and dining
Actually very modern and cheerful place, everything is shining.
The only problem that I discovered is that the journey from the .moment you arrive until you reach the gate is veeeeeery long, after you finish check in and immigration you walk through lots of corridors then take a train then a lot of walking again, then go down to your gate.