Old and New - Avoid the "Tower"
I have previously stayed across the street in the newer part of the hotel and the rooms were pretty good. This time, I was put in the "Tower" on the other side of the street. The room was the smallest I have seen in quite a while. The heat did not work, no matter how high I turned up the thermostat. I was told by colleagues who stayed on the other side of the hall that their rooms were oppressively hot and could not be cooled off. While taking a shower, the water temperature varied annoyingly.
While attending a conference, we were given an internet code to access wi-fi in the meeting rooms. Many of us kept getting a message stating that the access for our group was full with other users. Again, extremely annoying.
On the positive side, the banquet food was above average.
There are several other better full service hotel options in downtown Denver. I recommend trying one of those.