Service, View, Decor - Top Notch
Went here one business for a week. Perfect location - couldn't be easier to get from the airport to the hotel via the "L" (subway). 
Excellent section of town with shops, bars, restaurants, millenium park, and quite a few office buildings all within walking distance. Again near the L station for those attractions further away (Wrigley Field). 
Decor was excellent. Truly warrants the TripAdvisor distinction of "trendiest hotel." From the pleasant staff waiting in common areas ( and I mean shockingly nice and helpful - some of the most attentive and proactively helpful staff I've seen), to the time of day specific "nature" sounds in the halls, to the 5 or 6 celebrity voice wake up call options, to the decor in each of the rooms -everything screamed that this is an upscale, trendy, tech friendly (for extra cost ) hotel. 
If you get a chance - ask for a corner room on a higher floor - having two sides of your room floor to ceiling windows open to the chicago skyline is unreal. 
Ate at two of the restuarants/bars in the hotel and was very, very impressed with the decor and food at those as well - but that is for other reviews. 
Fitness center has new equipment and enough to service a hotel of this size - even the decor in there a step above most places. 
Bottom Line: It is expensive - those without expense accounts will endure a hurting wallet but will absolutely enjoy thier stay and thanks to the great location, most likely enjoy thier trip to chicago as well.