The positives - excellent communication from Matt & Wendy before, during and after our stay; location is 5* and apartment was clean and tidy. Only negative is that this is not a "LUX"/"Luxury" apartment as - there were no clothes hangars, only 1 wine glass and limited other glassware, crockery and utensils (for a place that sleeps 4 to 6 people) and the bathrooms are very small and basic.
These things did not detract from us really enjoying our week in Chicago but if you are expecting "Luxury" (St Regis, Four Seasons, Ritz Carlton) you might be disappointed with "Clean and Functional" (Hilton Garden Inn, Embassy Suites).