Not a 4 star--No cell service or WiFi
While the rooms, interior decor and location are nice, customer service is terrible. As a previous poster stated we booked through Priceline and were also charged an extra $40 per night to "upgrade" from a King to two queen beds (upgrade to queens???). However, this is the first time we ran into that particular situation with booking through a discount broker. (Last time in Chicago, we were upgraded to a penthouse suite! How sweet was that!) The biggest problem was there was NO, I repeat, NO, cell phone service in the rooms! No WiFI either! 
The view from the room was of the electrical equipment which I guess you can expect with discount rooms. Doormen were standing around when we arrived and in no hurry to assist. After checking out, the head doorman forget to turn in our ticket to retrieve the car and we had to wait an extra 30 minutes or so until a bellman with our luggage checked into the problem.
Overall, the renovation of the Blackstone is very nice and the rooms are comfortable, but not on my list of recommended places to stay in Chicago.