Had a car from DXB the last week. Pleasant experiance with helpful staff.
Last time I was in Dubai they had the meet and greet, now they have their own counter and dedicated parking. Did the paperwork at the counter and collected the carkey in the parking lot. The Sixt representative even helped me with my luggage. Everything went smothly, was in the car within a few minutes.
Drop off was easy as well. Shortly after turning into the parking lot a representative came to check the car and confirmed everything is okay.
Car itself was brand new and very comfortable.