My reservation was not booked at the Hotel in spite I'd paid and received the confirmation. The reception staff was quite suspicious and said only "they cannot arrange a room" until I showed the confirmation copy on my smartphone. The staffs seemed to have no idea and been stuck when they're faced with some accident which they don't learn how to deal with or beyond the "textbook".
What's more, they asked me the rate at which I'd made a reservation and even whether I'd paid or not!!
And they even told me to send the copy of confirmation to their manager by myself!!
There's no apology or consideration though they sighed so many times...
I have no idea this trouble was caused by Hotels.com or Ascot because there's of course no explanation.
Anyway, I recommend those who plan to stay at hotels in the Gulf should bring the copied confirmation. Such behaviors are quite common even at 5-star hotels in Gulf area, where many staffs are expat workers lack of enough training or loyalty to their duty.
Except for the above, staffs were friendly and nice. The room was a little bit old-fashioned, but simple, cozy, and so quiet (not loud as other hotels) that I could sleep well.