Nate is a great host. He is very accommodating and easy going, so you shouldn't have any problems with him. I was visiting Chicago to attend a wedding and a friend came over for a night, and was also able to use the futon in the other room. Nate even drove me to the wedding which was not far.
The location is pretty convenient. It has a metro stop nearby, which goes to downtown, and is not far from University of Chicago Campus. The only downside is that the neighborhood does not exactly inspire the feeling of safety, but the people I ran into were pretty nice, and the apartment seems very safe. You can occasionally smell pot, if you are sensitive to that stuff and if it bothers you, but if you keep the doors closed it should be fine.
The rooms were really well cleaned. I haven't used the pool table, or much of the kitchen, but they also seemed well kept.
I would recommend this place for anyone who is visiting Chicago, especially if they have business at the University.