Previous thread on the topic from my visit to Chicago last month:
As I mentioned in the other thread, I stayed at the Club Quarters. I picked it mainly because it was walking distance from the train station, and reasonably budget friendly (not that anything in that area is cheap). The location is great, right in the heart of The Loop. The room was perfectly fine. I’m sure there were fewer amenities compared to the pricier options, but it was clean and comfortable and modern.