I can't recommend Theresa's carriage house enough. I was in Denver for a month and this was the perfect long-term stay for working remotely and exploring the city. And, it's in a great location -- less than a block from a park and close to Tennyson St.
It was impeccably clean and comfortable, and Theresa was attentive, kind, and responsive; there was a small issue when I first got there (completely out of Theresa's control) and it was handled within 24 hours. I would definitely stay here again in the future. :)