The room is in Silvia's house. The second floor of the house is a separate apartment just for guests, and there's another bedroom in the apartment that is rented out on AirBnB as well. In my case, I had the entire place to myself for the first half of my stay.
Silvia is a very hospitable and accommodating host. Don't be shy to ask if you need something, I only had very positive interactions with her. She's quick to reply and always around. She also didn't mind me waking up super early every day as I was jet lagged having just arrived from Europe.
I slept very well but I may be on a taller side (6') and I found the bed a little short. This wasn't an issue for me though.
Stephen's advice on public transportation in an earlier review is very useful. The only thing I would add is don't rush to connect to your Ventra card to your phone - your plastic card stops working then, and CTA have recurring issues in reading contactless cards. In my case I had to spend a couple of days sorting this out.