Like the other reviewer, I also had a ceramic insert slower cooker that cracked. I replaced it and gave the unit to my daughter. I then bough this unit with the aluminum insert. Now, the insert is bubbling and cracking and I am afraid to use it. I would like to get a replacement for the insert. At the cost of these slow cookers, there should be more attention paid to the quality of their inserts. I have not had a problem with the either of the actual electrical units of either of the two that I have purchased. I have many pieces of the all clad cookware and am happy with the stainless steel cookware.