Isaac has a great place that is located about 30 minutes bus ride away from the Chicago Loop (Downtown), in the Ukrainian village. It's a lovely apartment that Isaac also shares with the AirB&B guests (shared bathroom and amenities). Four things worthy of note (some of which are already mentioned by other guests):
1) You must get a combined Ventra CTA (metro) and Bus ticket as the apartment is a good 20-30 minute walk from the Blue CTA line (Western) or the Green CTA line (California) but it is perfectly accessible by numerous buses that go in/out of town 24/7 - buses are the way to get to and fro - but from O'Hare you'd get the Blue CTA line to Western and then the bus (or walk). I paid $28 for a 7-day unlimited ride ticket - it was brilliant! Use the "Citimapper" smartphone app too - it gives you live updates on buses/trains/uber etc
2) The apartment is on the 1st floor, and it's a walk up. This is no big deal and easy enough (single flight of stairs) - just saying, as some people have mentioned in previous reviews they expected an elevator.
3) The apartment is over a bar (the EZ Inn) - again, this is mentioned in many of the reviews. You DO hear the noise/music/chatter from the bar, and it DOES go on until well after 2am (longer on weekends). Again, this wasn't necessarily a problem (because it was expected), in fact the bar is quite fun and you should go down for a drink, but just be aware it is noticeable - very much so.
4) This one isn't in the reviews (that I've seen) or in the description, but there's an active webcam in the kitchen above the pots and pans (which you really don't notice and I only saw by accident), facing towards the entrance door that Isaac uses (there are 2 entries into the flat, the AirB&B one, and Isaac's one). The reason I mention it is because it is also pointing in the direction of the hallway right where the bathroom door is and I only spotted it after 3 days of walking around (naked) what I thought was an empty apartment. I asked Isaac about it and he assured me "it isn't recording" - but it's active and it's clearly transmitting something somewhere. I'm not prudish and I'm sure it's nothing sinister as Isaac is a genuinely nice guy, but I am mentioning it so you have the option of covering up to protect your modesty should you desire (or asking that it's disabled for the duration of your stay).
In summary though - a great place to stay - affordable and convenient. :-)