I finally replaced my 22 year old profile wall oven with this newer model.  My first time baking a cake was a disaster. I called service and requested a temperature check. Without and exposed bottom heating element (it is now under the floor of the oven) it is my opinion the oven needs an extra 10 minutes to preheat. Now when the oven alarm states it has reached the desired temperature I wait an extra 10 minutes. In doing so, all my baking and roasting has been very successful. I like the new rack designs as well as the control panel.