I had a licensing exam at the Merchandise Mart, and decided to stay at the Comfort Inn Central, which is attached to the Merchandise Mart. It was very convenient to wake up and walk 2 minutes to my destination. On the positive side, it was clean enough, staff was friendly. And the shower was actually great. Wifi was included, which was huge for me, as was a hot breakfast. The outdoor pool was nothing special, but it was there.
On the negative side, it's an old hotel. Elevators are slow. I had to run my electronic key in the door about 6 times before I was able to get in each time I tried to enter my room. My room was small. The hotel's proximity to the highway (and some train line) makes every room noisy - bring earplugs if you are a light sleeper. Weirdly, the pillows on the bed were half the size of a standard pillow. I'm not sure why.
In all, it was an acceptable place to stay. It wasn't less than I was expecting, but I didn't have high expectations.
A note to location. Besides the Merchandise Mart and a couple of fast food joints, this place is near nothing. If you want to visit Denver, this is not a good jumping point. It is an industrial area, I couldn't even find a 7-11 nearby. But if you need to be at the Merchandise Mart, and don't need or want to go anywhere else, this is a decent place to stay.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC