The 333/sedan is a Dick Genth design from the late 70's. It is a flybridge cruiser with the looks and performance of a sport boat. The design reminds me of the Wellcrafts and Thunderbird/Formulas of the day, which Genth had also been part of.
I know of no design flaws or problems with the 333/sedan. It is a good performing hull with alot of value for the money.