The airport Sheraton is nice but out of the way from the city. It can also be very expensive and unavailable at times, especially if there is a fair in DUS. The Four point is in a great location in the city. It has been newly renovated so the rooms are nice. But there is no executive floor/lounge in the Four Point. They gave me the best corner room they had as a Gold. At the airport you have to be platinum to get an upgrade. Service is a bit friendlier in the Four Points (mostly because the airport Sheraton is so darn busy).