I booked a room with a double bed, but we ended up with two reunited single beds, and the irony was that the two mattresses were not even the same, I had a very firm and even hard mattress, while my partner had a very soft one, so the two mattresses kept on separated, and I woke up each day with a back ache.
When I try to talk about it to the front desk, I've been told that nothing was promised to me, even though it was on the booking, and even though I paid more for it.
I wouldn't have cared about the toilets flush being so weak, we had to push on it 3-4 times, and the mold around the bathtub.