Location, location, location
While this is a nice hotel, it is part of the McCormick Place, the convention center on the south side of Chicago. It is NOT centrally located, easy to get to, or have any neighborhood amenities to speak of. The rooms are nice, but nothing unique. In short, if you are attending at conference, and don't plan to get out much, it works. 
Yes, there is buses and taxis, but it is too far to try and walk anywhere. The staff is helpful and there are a number of services on site (restaurants). Suitable for business travel. Families and couples should look at other hotels closer in to the city, or in areas with more options to offer.