We liked Ours a Lot
We owned C28 Hull #100. I believe that they changed to a two spreader arrangement beginning with hull #101 in order to completely stiffen the mast. Boats before that hull were retrofitted with a stiffening kit at the halyard exit plates. Our experience was on the far end of the spectrum as our boat was also a tall rig and we sailed San Francisco Bay/ Northern California where the winds are consistently in the upper teens/low twenties. Consequently, our mast was a bit more noodlely than we would have liked it. Sometimes we would develop a harmonic (mast pumping) which we could eliminate by halyard tension or a slight change in heading. Admit ably, a tall rig isn’t the best during the summer months in SF. However, we were amazingly fast in winds up to the low teens. On more than one occasion we would unpleasantly surprise one of the “go fast” boats by "cruising" along side of him. From a systems perspective, the C28 shares many of the components with the C30. The boat was easy to maintain and very good to us. The reason why we sold her was we traded up to our “dream” C34. Our old boat is still being raced in the South Bay and is doing pretty good as we occasionally see her in Lat 38’s racing sheet.