So I'm heading to Boston for the long Labor Day weekend. I'm thinking of staying at the Westin or Marriott Copley Place. Is this a good central area of the city to stay and see most of the city? First time in Boston so will want to do all the touristy stuff. It would have been great if I was able to take a week and hit both NY and Boston together and even take the Acela for the first time between the two cities, but with work and all, I have to break up the trip into two parts. How is the subway system in Boston?