We received this as an anniversary gift. For the last 8 months we've enjoyed brazing, making rice and slow cooking meals, using this about 1-2 times per week.  We've always hand washed the insert, so no issues with bubbling of the aluminum insert. Without explanation, the slow cooker just stopped working and gave us an F1 error message. A YouTube video from a electrical engineer help us understand that the electrical components are not to spec for the normal use of the unit. We hope that All Clad will stand behind their loyal customers (we have/love a full set of SS cookware, waffle iron..),  and improve this product that seems to be a popular, yet needs attention.