I bought two of these after my ceramic insert burst in my old Crock Pot.  I use these every weekend to make the next week of meals since I work out of town.  After 2 months both inserts had blister stars indicative of improper surface preparation prior to coating.  Williams and Sanoma replaced them.  Now one had the surface peel off in sections and the other has many blister stars.  I never used the inserts on my stove since it is a magnetic induction unit, and never used metal objects and this occurred.  I want to replace the inserts in kind, but I can't find them.  Please contact me with this information.