We did not get to use it. Their website informed us that they would be available from 9 pm to 9 am, and we had a 5 am flight so, it seemed perfect.
We were flying out of Abu Dhabi, arrived at the airport at 8 to check luggage in, and could not pass through security more than 4 hrs before the flight.
Returned at midnight, there was no one from Oman air to check us in until 3 am.
Of course we tried to cancel the reservation when all of this started at 8 pm.
The hotel told us we had to cancel with Expedia. Expedia tried and was put on hold forever, and the agent told us he would keep trying, and they never resolved / responded.
The hotel did clearly state they had a 24 hour cancellation policy (you lose your money if you cancel within 24 hours).
Expedia tried. The hotel didn’t. Make sure your travel plans allow you to actually get into the terminal prior to spending $200 for a 12-hour stay.