Do not go for restaurant week. I got food poisoning from either the seafood chowder or else the crab cakes ("special" crab cakes for restaurant week only).
A good rule of thumb, don't ever trust a restaurant's "special menu" for restaurant week. Chances are it's a menu that's high on profit and low on quality/value.
I went one other time on a business dinner and recall only the oysters being so-so. My entree (whatever it was) was nothing to write home about.
If you want good, FRESH seafood I would choose Upstream over McCormick any day.