Great location, Greg was very accommodating and friendly. I got in pretty early but was able to drop my bags off at the Airbnb before check-in. I was in Chicago to take an improv intensive at iO, and it was perfect for that. The neighborhood is wonderful (try the french cafe at the corner of the street if you can!) and it's a quick walk to the Armitage station and a 15 minute walk to iO. Also! Try the breakfast! I had the Verde and it was fantastic!
I do want to note though, at the time of my stay, my bedroom didn't have a functioning lock on the door. I never felt unsafe, and Greg said that he was planning on fixing it soon, but since it is a shared space (there's a second rentable bedroom and a shared bathroom between the bnb's) I could understand someone being uncomfortable with the arrangement.