I've stayed at the W Boston twice in the past 3 weeks. Overall good experience and a big improvement over the very tired Westin Copley.

Booked Wonderful King on both stays. On the first stay, I was greeted profusely as a platinum by the FD clerk and he commented a couple of times about how much I must stay with Starwood to have so many points, so I was thinking I was in for an upgrade. Got to the room and found it to be a standard, smallish king room. Checked online and saw mega corner rooms available - called down an asked, and after some checking around, was moved. Room was a large corner room with 2 queen, lots of space.

On the second stay, I was pre-upgraded (without any effort on my part) to a "Studio Suite". Not really a suite, but a large corner room with a chair and a sectional lounge-sofa thing by the windows, a large bath with separate tub and shower, and a nice desk arrangement behind the bed.

I'll definitely stay again when I'm in Boston.