I don''t have a whole lot of information specific to the J-28. I have always looked at J-boats as being well above average in terms of build quality. J''s of that era were better built than some of the earliest J''s that had reportedly more extensive delamination and core problems. The J-28 do predate the SCRIMP system, which has further improved TPI''s lamination and core reliability. The few owners of J-28''s that I have encountered were very positive about their boat''s build quality.