Have been there, indeed last Dec17, and the room was stylish and big, 16th-floor exec room with partial river view (I guess this is the best you can have).
Lounge was OK, normal breakfast and open during weekends (not like other places where it is closed - like Magnificent Mile Marriott).
As I read, interior (no windows) but all clean and well stocked with water and all beverages.
Honestly after visiting Chi over the weekend and stayed in this one, as well as Magnificent Mile by Marriott, and a couple of Courtyards river north, I go for this again in April
Regards,
C