We stayed at the lower level for 9 nights after our daughter's surgery. The house is located in a nice quite neighborhood, close to the Orange Line stop (Stony Brook, 5-10 min walk), Whole Foods (5-10 min walk), coffee shop (City Feed, 5 min walk), kid playgrounds (10 min walk). It is an old one bedroom apartment in a good condition. The apartment worked well for us. Our daughter had plenty of room to play. I cannot comment on our own experience as adults since we were mainly focusing on her recovery and did not do much other then look after her. We even turned on the TV only once in 9 days.
Josh and Sarah were ABSOLUTELY GREAT. They were very accommodating and very welcoming. I gave 4 stars because the apartment was a little dark.