As everyone else has mentioned, the location is the major selling point here. The apartment is perfectly situated walking distance from all of the best sights that Chicago has to offer.
Note, the place is quite small - a studio apartment, so it is really only suitable for two guests. My boyfriend and I shared the space for a long weekend with no problem. It's in an older building, and some of the fixtures (bathroom) are older, but the main parts of the apartment are decorated nicely, are clean, and basic amenities are provided.
Dino was also a great host -- quick to respond, flexible about check in/out times. Definitely recommend!