Stayed here during a conference at the Convention Centre next door. It is perfect for this as it is connected by a skybridge to the Westin. The rooms were very spacious - definitely above average for a standard room. It has the additional advantage of being close to the airport.
I stayed 6 nights here and had no real problems. I ate in the restaurant (Saucity) once for both breakfast and dinner and found it quite good.
The Westin Waterfront is not cheap but then Boston hotels are not cheap. The area is uninspiring - I would only stay here on business.
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