Update:

Update:
Unfortunately I stayed at the hotel again. I am not sure what I thought, probably the convenience to the airport blinded me.

The room was really on the border of dirty. Lots of items which would have been easy to fix but nobody cared. The white bed sheets are not that white and lots of little black spots. One towel was white and newish the rest was really old. The carpet had stains... 5 star is very different in some countries.

I think the best way to explain the quality standard is by when explaining the water bottles in the room. There had been two bottles which are free for members. I was going to open one when I noticed that one was half empty. I looked at it and you could tell the last guest had already opened it, and afterward placed the cap back on. Easy to spot, normal procedure for a good hotel but when I told guest services they blamed me for not telling them earlier so they could have brought another bottle.
The problem was not the bottle but the lack of detail for cleanliness and quality control. I had booked the hotel with breakfast for the flight back but decided not to eat there because of their cleanliness standards.

They probably have better rooms somewhere but the 6th floor seems worth than the rest.

Old Review:

This is a true airport hotel, they think there are not many alternatives and their service shows this.
The rooms are ok to good, but I am not sure how clean they are. The minibar has an option for an area for private use and it still had the wraped sandwhich from the guest before. If the cleaning staff overlooks that, who knows what they wipe down or not.

The heater was broken, both heat and cold settings had the same AC outcome even with the max temperature setting. The shower in the morning was a bit warmer compared to the cold room temperature but the max setting was not very warm.

Overall not a 5 star hotel, I am not sure how they could even claim to be a 4 star.

Maybe I got unlucky but who knows, I called the reception 3 times during the stay and even after a long waiting period nobody picked up.