I stayed at Mark's place for 5 weeks and it was perfect. I loved that it had a parking space and enclosed courtyard. It was very spacious, well kept, and had great decor. This isn't a typical AirBNB - this is clearly a home that someone put a lot of thought, time, effort and money into. The kitchen was large and well-equipped for cooking. The beds were comfortable. I LOVED the spa-type shower. The train is close to the apartment, and you can hear it, but it did not bother me at night.
And Logan Square is just amazing. The apartment is within easy walking distance to a ton of excellent restaurants, bars, shops, yoga studio, grocery store, and gym. It is an easy/quick train ride to downtown, nearby neighborhoods, or to O'Hare.