The place was clean and comfortable. The upstairs bed was comfortable. The fold out couch was adequate for our kids but might not be so comfortable for an adult. The small kitchen was very well stocked. There were all the basic spices, and even apples, bananas, onions. There was only a low quality vegetable oil for cooking though so bring your own olive oil if that's important to you.
We love this neighborhood in Denver. There are plenty of great places to eat and Highland Park was within walking distance.
We brought our 11 month old along so we were on high alert the whole time because there are stairs but no baby gate. However we knew this when we rented the place. Parents of littles should keep this in mind though. We only stayed overnight so it was fine. But I wouldn't stay longer with babies or toddlers without a baby gate.