4-star minus 4=big fat ZERO!
My family and I stayed at the Hyatt on Wacker Dr. on March 27, 2012. We were excited about the great price we got for your 4-star hotel through priceline. Unfortunately, we were not impressed. In the past, we have stayed at the Hyatt in downtown San Diego for spring break on the Marina, but chose to stay closer to home this year. The room was not clean to our standards when we arrived, even though we paid for an upgrade. We asked for it to be cleaned while we were sight seeing and were assured it would be looked after. Upon our return, nothing had been moved in the room to re-clean including the tea my sons had made prior to our excursion so I can only assume, it wasn't even checked as promised. We only had 3 towels for the 4 of us and had to call for more. They were promptly delivered but room service took 40 + minutes to deliver us a knife and corkscrew we essentially paid for because we felt compelled to tip even though we had to call and ask for it twice! The curtains were dirty and frayed by the vacuuming, the bed skirt had a foreign stain on it, the honor bar/fridge was gouged and dirty, too! The mirror was dirty and the beds appeared to have been jumped on - not neat and tidy at all....There were boxes of trash in the hall and an old refrigerator or two as well. Very disappointing to say the least. I have buyer's remorse and wish we had just taken the train home and stayed in our own beds! We were compensated for our upgrade - $20.00 but given the price of parking, taxes, and etc. at this point I wouldn't recommend this Hyatt to anyone. My husband travels and uses his Hyatt business travel points quite often and also expected better from your 4-star hotel. 
I felt compelled to let you know how unhappy we were with your facility.