Failure on many counts
I'll be honest, this is probably the first and last time I'm writing a review. The Hyatt McCormick Place has moved me enough to do so. They've got a monopoly on the convention center and they know it. Prices are exorbitant and what you get for it is sorely lacking. The rooms are a completely disgrace to any Hyatt. Twice I've stayed here and twice the sheets in a new room showed stains. They were fresh sheets all pressed and tight but there were brown stains on the edges. The bathrooms are quite the joke, a cube like relic from the 90s that can barely fit a toilet let alone a bath. The shower lets out a high pitched whine every time you turn it on and the shower curtains aren't long enough to cover the entire bath and you almost always end up with a wet bathroom floor. The vanity fixtures are dated and barely functional. Even the closet is just a curtain drawn across a small cutout space. 
The absolute worst part is the noise. The walls are paper thin. You here both adjacent rooms at the same time. It's not just a dull muffle, its full on conversations and even cell phones on vibrate. That is just downright ridiculous. Whenever a door shuts 5 rooms away, you get jolted up in the middle of the night. I'm not a light sleeper but this hotel design is a joke. And by the way, you can pay an upcharge for fridge in your room. Seriously???
Unless you absolutely have no choice or just like to suffer, stay far far away from this dump. Great service staff though. Nice, polite and almost apologetic knowing that you got suckered.