Stuck in a smoking room on the 2nd floor = poor rating
We booked a non-smoking room three weeks in advance of our trip and when we arrived in the evening were told they only had a smoking room on the second floor left. Naturally, the room stunk like a cigar shop - my wife had to go out and buy deodorizer to spray around. We also had a great view of an ugly wall and alley. A noisy generator or exhaust fan made the evening even more enjoyable. 
We were moved to a non-smoking room on the sixth floor for our next night. This was the room we expected when we made our booking. On the positive side, the hotel was clean and in a good location. For the price we paid, I expected a better stay.