Welcome Newself,
Bab's will no doubt tell you more about restaurants in Boston and Catman is on call for Omni explanations.
As far as 'Legal Seafood' goes, I have only been to the one in the Copley Centre, but I think they are all pretty much the same, I wasn't at all impressed, in fact I was very dissapointed. But don't read too much into that, the company was not very good and I am not a great seafood lover.
There is a good restaurant at the Hyatt though...
MF