When I used shower, the shower head fell down over my head many times. It was very dangerous and inconvenient. Because the reception staff asked me whether I was satisfied when I checked out, I explained this problem to reception staff. And she said, "You had to tell us immediately."
I can't understand why we "have to" report any problem. Before our arrival, they "have to" check all equipment of the room.
Because the hotel don't check your room condition before you arrive, I strongly recommend you arrive the hotel about 1-2 hours earlier before your schedule. Before you use your room, before you open your luggage and take a bath, you had better check all equipment of your room by yourself. If you find any problems, you "have to" ask the reception staff to fix them.