Ate at their Arlington location last night.
The outdoor tables were open, which is my favorite time of year to eat there.
The food was awesome. When they got a side wrong they comped me the original side order rather then just keep it and give it to the next person.
There was also another more complex service issue which I observed while I was there and they absolutely bent over backwards to accommodate the customer to the point that I was honestly shocked. My reaction was: "what kindness."
All the while I felt like the interaction with the clientele, not just me, was one of caring and genuine hospitality. The vibe I get there is that every single person who works there actually cares about the customers and the food. This is not something I often experience in Boston.
For me the folks at Blue Ribbon define hospitality.