Gavin's place is rock 'n' roll heaven - beautifully curated and full of exciting objects. Gavin was very communicative and met me when I arrived: he also went out of his way to give me space and leave me alone in the apartment which was much appreciated. It's an easy bus or subway into town and the hipster heaven of Wicker Park is just up the road.
The only issue I had was sound-proofing: the adjacent apartments are very audible and I was woken more than once by neighbours. Ear-plugs essential!
Other than that I would highly recommend Gavin's place for your stay in Chicago.