This was our first time using Air BNB and visiting Chicago, both exceeded our expectation. As others have said, the house is very convenient for the Blue line (airport to downtown) and you can be in central Chicago within 15 minutes. It is a short walk (3 minutes) to CTA Station. The house was the best place we stayed in during our stay in the USA (we were on a short Great Lakes tour) and Chicago has so much to offer. The space was simply and beautifully decorated, a calming environment to spend time in. We (2 adults + 2 teenagers) were all comfortable in the space, all the facilities worked as detailed. I only used the key lock from my mobile once to get in first and preferred to use the 4 digit key code - be aware that you need to enter the digits quickly (steadily), otherwise it seems to time out - we quickly got the hang of it after Kath showed us.
The host, Kath, kept a low profile which suited us. but was very helpful and even offered to drive us to a retail outlet as two of our bags were temporarily lost by airline - luckily we did not need to take up her offer. We would definitely recommend this space - thank you Kath.