For context, my hubs and I are early-50s and not in great shape, but we do ok. The apartment is in a lovely and safe neighborhood--far enough away from the city to get some peace and quiet, but close enough to get downtown quickly (45 mins to most major destinations). We used the bus and/or train daily; the bus is about a 5 min walk and the train just another 2-3 minutes from there. We even took the train early morning to the airport, with backpacks and big heavy suitcases. That's how convenient it is! We were there for a week, and the $20 7 day CTA pass was the best decision!
The apartment was very clean and looks just like the photos. Moises was helpful and responsive to questions, and even did us a solid favor that was very much appreciated. There are a few steps down to get to the apartment. The master king bed (which is a rare find!) was very comfortable for us, but it is is soft (just an FYI for those who prefer more firm mattresses). We didn't use the second bedroom at all so can't comment on it. Bathroom is spacious and included a hair dryer and even a diffuser - much appreciated by this curly haired gal! Great water pressure too. Kitchen is well stocked. We didn't use the stove, but utilized the full size fridge and microwave to heat up leftovers.
Two things to note for the discerning traveler: 1) The couch in the living room is a pull out sofa bed (which we didn't use) and wasn't overly comfortable just to sit and relax on (in our opinion) and 2) It is a basement/garden apartment (there are plenty of windows and natural light, so it doesn't feel like a basement at all) but you can definitely hear noise from the unit(s) above...at all hours of the day and night. If you're a light sleeper, bring ear plugs.
Would we stay here again? Probably not as is. With a more comfortable couch in place, yes. After a long day of site seeing, we like to be able to come back to a place and relax and put our feet up, and the couch was just too uncomfortable to be able to do that.