I promised to post a review after my stay, so here it is.
There was one problem with my stay here, but it was a HUGE one. At most hotels, when guests check out of their rooms, the rooms become available to newly-arriving guests as soon as they are cleaned by housekeeping. If you arrive sooner than the stated check-in time, most hotels let you check in, as long as a room of the type you reserved is available; occasionally such a room is not available, but usually they do.
That's NOT what the Millennium does. At the Millennium, check-in time is 4:00 p.m. and they will not check anyone in before then. As a result, instead of arrivals being spread out over the course of the day, everyone lines up at 4:00 p.m. And the number of guests lining up for the 3-4 check-in clerks can be huge, since the hotel has 872 rooms. I arrived on a Saturday at 3:55 p.m. and was the 25th person in line. (Yes, I counted.) It took twenty minutes wait until I was checked in. At that point - 4:15 p.m. - the line extended all the way from the check-in desk on the Sixth Street end of the building, to the elevators for the south tower, near the Fifth Street entrance. At that point, SEVENTY-NINE PEOPLE WERE WAITING IN LINE TO CHECK IN, SO THE WAIT WAS AN HOUR. This was absolutely unconscionable. And it would be so easy to fix, too, by letting people check in earlier, as soon as rooms become available.
I didn't experience any other problems. However, I didn't arrive by car, and some of those who did, reported that the parking garage was full - yes, in the middle of the afternoon. The room itself was okay, perhaps a bit cramped but nicely furnished, clean and comfortable. The wifi worked. There were no premium channels on the television, though. The location, in the middle of downtown Cincinnati, was very convenient. Bottom line, if you arrive in the evening, you might find your stay at the Millennium Hotel to be quite pleasant. But if you arrive in the afternoon, you will hate this hotel before you even get to your room.