I often go to Legal not because their food is the absolute best quality (it's really not, it's fairly boring and sometimes a bit weird), but because they are rigorous about allergies. Knowing that I can eat my somewhat boring grilled bluefish meal without my dining companion's shrimp - or the undetectable and unlisted shrimp in the stock they use for the clam chowder, or the fact that they use the same steamers for oysters and lobsters - killing me is definitely worth it. It's not something a lot of Boston seafood restaurants are as good at.