Havn't done the Hyatt, but have the Hilton. Nice rooms, good for plane watching. odd chairs, really comfy beds. The front desk staff was nice, the rest were downright crabby (even for Boston) wit the one exception of one of the waitresses in the dining room who looked like she was struggling with her boos just to provide a little customer service. Not that this is a really expensive hotel and one of the ones that loves to nickle and dime you for everything.

Really convenient if you are parking at the airport (there is a connector from the garage on level 2) but you have to either take a shuttle to the Blue Line or wait for the Silver Line Bus to get into the city if that is your goal.