Very good place to stay in Boston with just a few minor flaws
This Marriott is extremely well located for the Back Bay area, especially if you are going to a conference as it is connected via skybridges with the Copley Place Mall, the Westin Back Bay, the Sheraton Back Bay, the Prudential Center and the Hynes Convention Center.
Rooms are nice, bathrooms are a bit small and lack vent fans (so they tend to steam up when you shower) and the view I had was very nice. Internet is expensive and spotty at times, and is entirely wi-fi. One other complaint, the elevators seem to take an extremely long time to reach the upper floors (I was on the 18th floor) and so you need to allow a little extra time.
Still, I would happily stay here again if the occasion called for it.