The Chef Connect feature to our GE microwave (externally vented) is great. Both ovens heat quickly and the convection in the lower oven is consistent to my last GE...super!  The smooth top and smooth controls are easy to clean.   The only issue that I have had is with the oven probe. It has not been accurate when compared to instant read thermometers and can overlook food even when inserted per direction. But overall very happy with our purchase.