I really enjoyed staying at this place. The flat was very clean and fully equipped with everything one needs. Unfortunately I haven't met Matt personally but you could tell from his Emails that he must be a very nice guy.
The room was very cute and exactly as shown on the pictures.
Even though the building looked a bit rough from the outside, I found a very nicely furnished and decorated flat inside, which made me feel at home right away. The location is a bit outside the city center. However, you can take the subway, which is only a two-minute walk from Matt's place, and get there in no time. I absolutely recommend this place for visiting Chicago and would book it again any time.