I was in town for a concert at Soldier Field and needed a place to crash for the night. Charlie's place got the job done - it was a 15-20 minute walk to the venue and proved to be the best option in the evening when all I wanted to do was quickly head home to relax after the show.
As mentioned by others, the apartment is right next to the train tracks, so you will definitely hear the train as it passes by. I didn't mind it, as I'm from NYC and I'm used to hearing the subway. It didn't wake me up once I was asleep, but I could see it being a problem for light sleepers. Since I was also only staying one night, it wasn't a huge burden.
Checking in was very easy and Charlie provided detailed instructions beforehand. I also appreciated that I was able to check in early, since my flight got in early. The space was as expected - it's a studio apartment and had everything I needed for the quick trip. The bathroom is on the smaller side, and it did take a while for the hot water to run. It took several minutes to get a hot shower, and I didn't get any hot water in the sink unfortunately. The entire apartment was very clean, the bed was really comfortable, and I especially enjoyed the pillows (soft yet firm - perfect for side sleepers!). There were also some amenities I didn't use, such as coffee and a big TV by the bed.
All in all, I'd recommend this to anyone who's looking for a conveniently located place and is fine with the noise from the train and has the patience for the hot water to run in the bathroom. It was a comfortable spot for my quick stay in Chicago.