Conference in Denver
I attended a conference in Denver recently and this was the hotel where the conference was being held and where we stayed. 
Rooms were on the small side compared to other Sheraton hotels I have stayed at in the past for the same type of conference. Rooms were clean and bedding very comfortable. Hallways could use updating, ie., carpeting and lighting. The heat in the room reached 80 degrees one morning and could not be regulated. However, the maintenance staff were right on top of it and it was fixed very quickly. The staff were very friendly whether it was housekeeping, front desk, conceirge, gift shop, etc. 
One night, the room key card was disabled. I had to go to the front desk four times to have it reactivated. On the fourth attempt (now going up and down the elevator and walking quite a distance in the hallway), the front desk sent security up to meet me to make sure the key card worked, which it finally did. I later found out that this happened to numerous people on the same day. 
The conference rooms were spacious and very comfortable.
Peets Coffee in the lobby area has great coffee and pastry to start the morning off. There is also a Starbucks just across from the hotel.....maybe 50 feet at best.
The area surrounding the hotel on the 16th Mall was very nice with numerous stores and restaurants and a free shuttle to take you up and down the Mall. You can get off and on the shuttle as many times as you like.