"Down East" magazine writes that Cape Porpoise Lobster Co. serves the best lobster roll in Maine.  I say they are second only to Red's.  There are two Cape Porpoise locations.  The Cape Porpoise Lobster Co. is on Pier Road just past the first big bend.  It's more of a lobster pound but I like the Lobster Rolls a bit better there than those from the Cape Pier Chowder House, pictured above, at the end of Pier Road.  Great chowder there, though.