As other guests have noted, the front TV room is cold, but they do provide a space heater. I think they are getting a better door. Even in cold winter, the bedrooms are warm/fine. In summer it would not be an issue, and then you would also have the lovely yard!
We stayed an extended stay during winter, during a kitchen remodel, with our 5 year old and it provided a much needed stylish home base for our routine, and exceeded my expectations in terms of just how easy it was to function the kitchen, do laundry, nice bathroom, big bedrooms both with closets, so it was really practical space and the location is great whether a local or tourist.
Aside from our family's extended stay, for business or pleasure travel for younger people it can't be beat with the location and spaciousness...with a 3rd bed, it sleeps 6. Hosts were super fast responsive to various small issues/questions. You do hear the upstairs neighbors (it's a 2-unit building), but that is normal city living and overall basic quiet hours were observed.
In case you were wondering, here is no toaster, but there is Roku, coffeemaker, laundry and laundry soap, shampoo, conditioner, warm blankets, nice hangers, etc.
All in all a great find in the heart of Chicago!