A nice room with a beautiful view
The best thing about this hotel is the view of Boston and the harbour from the dining room and from your room if you are lucky enough to be on that side of the hotel. It is spectacular. The hotel is convenient to the airport but we didn't hear airport noise at all. 
We had dinner in the dining room and the food and service were both good, although it is pricey. What was really surprising though, and a bit off putting, was that the Hyatt still charges for wifi ($12.95 for 24 hours). And there is a little coffee maker in your room, but only enough coffee to make one cup. How chintzy and unbecoming for a hotel of this calibre. 
When I mentioned at the front desk how surprised I was about their charging for wifi, the person at the desk said they get a lot of complaints about that and cancelled the charge. So if the Hyatt hasn't changed their policy on this by the time you go, make your feelings known!