Not the but not the worst - right there in the middle, really. Not a dive, but far from luxury or "Magnificent", as the ad suggests. Prime location, central within walking distance to most things in Boston.
Biggest complaints are the cleanliness & the responsiveness of the customer service staff. When I arrived, there was no soap in the bathroom to wash my hands. It was 10pm, a little frustrating after 9 hours of travel. The dusty floors and furniture - literal clumps floating around when you walk.
Aside from that, the clogged bathroom sink - I realize these things happen, and I wouldn't have been annoyed, but took 5 days to fix. Customer service very slow to respond. When finally resolved, no one told me until the day AFTER. Concierge didn't even know when I asked. Communication lacking. Huge window! lots of light. Blind is literally construction paper. Can you feel the paper cuts? Friendly/helpful staff. Greet with a smile.
Don't expect luxury as advertised. Decent value for money.