Great service, good location
First time visit to Boston and chose here because of it's location and good reviews on Tripadvisor. Staff very friendly and really helpful and the room and bathroom both really good size. Although there was building work going on outside during the day, at night time the room was quiet. Exercise room is small with just a few machines. Breakfast is a good selection in a decent sized room on the ground floor. Location wise it's perfect for exploring Boston - an easy walk to either Fenway Park in one direction or towards the centre in the other, and the nearest T (underground station) is just a few minutes away. Car parking is either by Valet or in the car park across the road - if you have a car then unless you want to explore Cambridge or further afield, best to park it, as Boston is easily walkable. 
The thing I remember best is the fact you can hang a card outside your room to request that it not be serviced that day (in return you get a $5 discount for breakfast or Marriott points) but in these eco challenged times, it's a really good idea in terms of reducing the amount of unnecessary laundry or other cleaning that goes on in hotels. More hotels should adopt this!