Our stay at Nick's was wonderful. My husband and I came in via train and Nick offered to pick up our luggage from us so we could begin enjoying the city. The room (which is really like a private little apartment) was very nice. Comfy bed and very clean. We weren't "home" very much so we didn't get a chance to talk with Nick and his family much, but when we did interact with them, they were all very friendly and accommodating. We really appreciated the donuts and fruit waiting for us outside our room in the morning too.
There were lots of Chicago guidebooks and bus/train maps in the room which were helpful to reference.
We definitely want to come back to Chicago and we certainly hope to stay at his home again!