Yep, I have changed the reservation to the Hampton. I appreciate the point of staying in the city, but the other real alternative is the Doubletree Club. I like the idea of the easy shuttle from the airport, some beaches nearby etc at the Hampton, and we do tend to use public transport so it seems to be easier.
It's not a cheap hotel though for cash, hence using points- but is anywhere in Boston! I left it a bit late changing really.