This hotel is billed as 4-star, however it is a 3-star product at best. It doesn't meet Mobil star criteria which makes me think the management awarded themselves the extra star in an effort to justify the unwarranted room rates. Rooms are cramped, dated and in rather poor repair. The street and drawbridge noise is bad, as other reviewers have remarked.
I must get on my soapbox for a moment re: Wi-Fi charges. At this point in history, wi-fi should be free, as it is in most down-market hotels I could name. Not only does this Hyatt charge $10/day for basic wi-fi, they charge for EVERY device, so if you want to use your tablet or phone in addition to your laptop, be prepared to pay again and again for a day's service. I find this to be an unconscionable ripoff as having more devices using the service does not cost the hotel any more.
Additionally over $30/day to park your car on top of the inflated room rates is offensive. However, if you self-park be warned that the walk from the parking garage to the hotel entry will take you through a filthy alley populated by winos.
In a word, AVOID this hotel.

Stayed here prior to a cruise. The location was very convient to the public transportation and walking distance to some attractions. The lobby area and lounge were very nice as well as other areas. The service thru out the facility was fantastic! The front desk and lounge staffs were top notch! The rooms on the other hand were a dissapointment. Ours had some mold in the tub that been caulked over and was coming back. The curtain was covered with dust next to the air duct. The walls had many black marks that detracted from the room and the rug was a bit dirty. Our room overlooked the bridge and waterway which made for a nice view but, we had street noise all night. Initial impression downstairs of this Hyatt was WOW. The rooms brought the experience way down. Would look at some other properties in this area next time.

I stayed at the Hyatt Regency Miami 07Nov2012 for a business trip. Hotel staff is very friendly and helpful and the location is central. My room was a double on the 16th floor - great view of the lock and drawbridge and gorgeous adjoining buildings but a bit noisy. Street noise was remarkably loud as was the ice machine directly across from my room. The property is older and does not appear to have been renovated any time recently but was adequate for my short stay.
I enjoyed the large granite work desk, nice view and extra large closet. The bathroom was a bit claustrophobic. The dressing area was separated by a short wall from the rest of the room affording a bit of privacy. The beds were comfortable though the one I chose to sleep on did have some stray hair on the linens. Aside from the loud traffic sounds, I could not adjust the heat and was cold all evening. No matter how high I turned the thermostat, the fan seemed to only blow cool air. I didn't notice any room service menus in the room so was forced to go downstairs to the lobby to eat at the restaurant there. The menu had only a few items and staff was helpful but almost too friendly. I got the blackened mahi-mahi sandwich which was delicious and Key lime pie for dessert. The iced tea was really good and the prices were reasonable for a hotel restaurant. Wifi was free for me because my client paid and connection was fast and easy. From the windows in the dining room on the lower level near the conference rooms,we could see tugs maneuvering a huge freighter through the canal - quite a treat. The grounds and surroundings were beautiful and there was a large veranda open to the canal on the back side of the hotel. I'm not sure what sort of breakfast items are normally served but for our meeting group pastries and melon were provided. Since many of the meeting attendees were medical professionals, the lack of protein and choices of fruit was duly noted. Good for business trips - I would probably recommend to colleagues.

We were put up at this hotel after a long delay on our flight back to London with British Airways.

Check in was quick and easy and the staff very helpful. As it was our honeymoon the staff kindly upgraded us to a suite (Miami Suite).

Due to the delay we were giving free meals served in hotel which we could not fault the food.

The room itself was large and had all amenities however was slightly disappointing for a suite but we certainly were not complaining.

There is no pool at this hotel and is more a business hotel in my opinion but there is a shop in the hotel. There is also a cafe and bar and restaurant.