We've gone the last two years, and will very likely go back this year.
The food and service are fine, but you shouldn't go with unrealistic expectations.
As others have mentioned it is not an authentic clambake.
You do not get all-you-can-eat lobster or crab legs! (You can get crab legs but they cost extra $$.)
In fact the seafood is a little disappointing, but of course buffet seafood simply is not going to be the same quality as a freshly prepared entree.
If you can get past these facts, it is well worth a try! The desserts are very good. In fact I swear I saw some women who thought it was a $24 dessert buffet, and getting their money's worth!