I purchased this appliance almost two months ago.  The motherboard went out and the oven was unusable for more than three weeks before being replaced.  Now I am having problems with he multipurpose large burner.  On the largest setting the burner stays on high and has burned my food.  
The oven does not heat up quickly.

I like some of the features, like the warmer burner, proofing setting, etc.  So far the oven needs to be wiped down after each use.  I am afraid of build up and I do not want to use the cleaning feature more than twice a year.  My old oven did not require a start button.  It takes getting used to.