I noticed that the toilet in my room was very dirty. There was fungus all over the bathroom. So it was impossible to shower without flippers. Quite disgusting. I would expect this in a public toilet in the street. Not a five stars restaurant. When I notified the reception, they said that they couldn't change my room, and that they were going to clean my bathroom, but they didn't, or not well enough. I might need to buy some medicine after using that bathroom for 4 days. Shame the Abu Dhabi branch doesn't keep up with good hygiene standards.
Picture below is just one example, fungus is all over the bathroom. I'm not sure why they just ignored my complaint