The flat is big and comfortable (in particular the beds). It is furnished with great taste, and we particularly enjoyed the art pieces. We could tell the host put a lot of effort into it, it was very clean and ordered. In addition, they were very quick and helpful about any issue we had.
The flat is very close to the green line, and it is a matter of minutes to go to downtown Chicago. However, the neighbourhood may seem unsafe at night. Although we didn't feel threatened while in group, from what we have seen we would advise not to wander around alone at night.