Carol's place is super solid. The location was easy to access by rail and is near plenty of bus stops. Given your proximity to City Park and Downtown, you should not feel pressured to get a rental car if you plan to stay in or near the city.
The living situation was great. Bed is great for two, the living room area is lovely for movie nights, and the bathroom will leave you feeling clean.
Carol checked in on us once to make sure things were smooth, and she was super quick to respond to just about everything. When I visit Denver again, I very much plan to stay at Carol's!