The 4.6 qt, ceramic clad perfect pan is my 3rd piece off Zwilling stove top cookware.  Love the way the flat bottom contact patch works with my smooth/glass top range.  My older pots became convex after only a few uses making them heat very unevenly.  No such problems with Zwilling.  And the ceramic coating seems to work extremely so far.  Premature to assess long-term but it does seem to be robust.  The construction also seems very made, definitely solid, heftier than my similarly sized previous pans.