Nice hotel!
Right next to the Chicago Theater. It is definitely more of a high end hotel than what I usually stay in. I generally would not stay at such an expensive hotel. In response to other reviewer's comments. 1) the taped/piped in sounds of birds, crickets, etc in the halls - didn't bother me. I'm from the country, so I'm used to hearing these noises. If anything it made it feel more like home. 2) I fully agree with those that complained about cost of internet. For the price of the rooms, it should come free. Most of the hotels I stay at offer this service for free. Being a business hotel as well, I'm surprised at the fees. 3) The mini bar - there is a warning sign posted not to move items as they are on sensors and you will be charged whether you consume the items or not. Think about it, they don't know if you have tampered with these items, so they have to be cautious if you move them. That being said, there should be room so that you can keep your own water bottles, left over food from restaurants, etc cold. You can have housekeeping bring you a mini-frige, but I'm guessing given the internet fees, that there would be an additional rental fee - I don't know for certain, we didn't pursue that. 4) I thought the food at State & Lake (their restaurant) was good and offered decent choices and most were quite affordable (except for the $4 coffee/juice, but that does seem to be refilled for free, so not a strong complaint).
Otherwise, I was suprised at how quiet the hotel was - I am a very light sleeper and tend to find that there are always noisy neighbors coming in at all hours of the night/wee hours of the morning, talking very loudly and slamming their doors. Not so at the WIT - I never was awakened by loud people in the hall - it was a pleasant surprise. I didn't hear noise from the traffic or the train, but we were on the 14th floor, so perhaps on other floors or locations in the building that would be worse.
I am so thankful for Travis at the consierge desk! I would not have seen nearly as much of the city without him. Yes, that's his job, but he was so kind & understanding of someone who is not "city wise/street smart" (my words, not his). He answered so many of my questions and gave me directions to get me safely & easily throughout the city. 
We were so busy, we never had a chance to make it up to the rooftop bar, but never were bothered by those coming & going from it as others have commented.