Dial M for Meh
Having stayed here for a week, I can thoroghly say that I've explored the depths of mediocrity. From the long line at check in, to the fact that my room was conveniently placed next to an elevator that seemed active at all hours of the night subtly shaking the room just enough to keep me awake. When I searched for a fridge, I saw in its place a giant, empty cupboard with dust and wires strewn about, and no sight of something that would keep my Chicago deep dish cold (how wrong I was to think I could take down a "personal size" in one sitting). I phoned the front desk, and in addition to seeming surprised that one would want a fridge in their room, they confirmed that the absence of a fridge was not a mistake, and that brining one to my room would cost 25 dollars. I refused such strange attempts at fleecing me for what should be a complimentary thing, and I never did finish that pizza as it went bad. #Hyatthatesleftoverpizza
Outside of the elevator constatly reminding you of its presence, the room was pretty nice. I had a nice view of another building, but I suppose that's not Hyatt's fault. What IS Hyatt's fault was the incredibly average, 28 dollar breakfast that was quite possibly the least appealing hotel buffet I've ever seen, and I've seen some pretty unappealing hotel buffets. Having to wait to be seated is kind of a pain as well, I don't really understand what they're accomplishing by making us do that, other than forcing busy people to wait in a line while the hostess eventually notices there is a queue. The servers were really nice though, so it wasn't a total loss. 
And then there's the lobby....oh the lobby. Though this isn't entirley Hyatt's fault, I will never forget having to navigate through the hordes of convention goers, Bud Light in hand, who don't know how to speak at a normal decible level. I realize that its the first time you've seen your buddy whose name you forgot since the last show in Tulsa, but take it outside man. For a good dose of middle Americana that will serve to shock and awe any foreign guests, spend some time in that lobby, or don't. 
As if to deliver one final, lasting taste of meh they tried to charge me $1 for a "connection fee" when I dialed a toll free number. I mean, what are you getting for that $1 Hyatt? Did you connect my phone especially well, such that I need to reward you? Or perhaps you provided a service which I couldn't have gotten from a payphone, for free...nope, not that either. In any case, upon seeing the bill, I reminded the concierge of my skills on the internets, and that such a fee didn't serve the "Stay Social with Hyatt, Write a Review!" urgings pasted all over the hotel. He removed it from the bill, and was nice about it, but I just felt like the fact that it was even there is a small metaphor for what this place stands for. 
So if you want a nice, personalized experience where everyone knows you and will go above and beyond to serve you, you might want to head somewhere else. If you're interested in feeling like human cattle, rushed through the factory floor that is the Hyatt Regency Chicago, by all means, enjoy.