We've stayed in Denver, and in the Capitol Hill area several times, and just love it. Our experience here, though, was one of the poorest I've had with AirBnB.
Driving up to the place. I thought "Surely this isn't the place" - the landscaping overgrown, there was trash all over the property, and the side entrance, which we tried, indicated that at least some of the building was occupied. In addition, there were MANY homeless folks who had apparently taken up residence there (Not just hanging out - apparent by the sleeping bags and refuse behind the overgrown bushes. Not normally a problem for me, so we parked on an adjacent street and got our bags to go to the room. After navigating the large crowd of people living on the property, including a group of men trying to revive a passed out drunken person, we found the main entrance, which was right off of Colfax.
The code given to us earlier in the day worked, so we headed up the stairs. Halfway up the stairs we were startled to hear someone trying to break in to the front entrance, so we quickly headed up the stairs. We found our room, and the key was in the lockbox, per instructions. Denver was experiencing pretty hot weather, so the room was pretty warm, and was only cooled by a window AC unit, which was struggling to keep up with the heat. The place seemed to match the description, and was clean, although quite worn and in need of many repairs, including the dead bolt lock on the door.
After our experience downstairs, and with the front entrance person, we quickly decided to let the proprietor know that we did not feel safe and intended to get accommodations elsewhere. I let him know, and we booked another place, gathered our things, and left.
En route to our new place, I received a call from an unknown number, which I later found out was the proprietor. I did not answer, but he did message me via the app to see what was up. I re-iterated our concerns, which he, over several message exchanges, continued to dismiss, never once apologizing for our bad experience or trying to understand our reasons for leaving. He told us that there were homeless all around Denver, and those folks were simply waiting for a bus. He also told us that the person we thought was trying to break in was an employee who had forgotten his code to the building. He inferred that I was a racist, because I was scared "Of a black man coming to work". He inferred that we were insensitive to the plight of the poor and homeless. NO customer service skills at all.
Strong "NO" recommendation. You can find a better place elsewhere in the neighborhood.