Plumbing was a bit of an issue and the response time was less than ideal regarding the issue -- I think it is because it is not being ran by one individual person but by a group. Zen did however, provide a refund for the day that we had the issue, and they provided plenty of instructions on how to get into the building, what to do, ect.
The location and price were a great deal compared to other airbnbs in the area. It is very safe, close to the train, and only a 15 minute walk from the U Chicago campus.