After using the upper over two times, the oven took 20 minutes to reach 350 degrees, and would not reach 400 degrees.  While using the lower oven, we heard metal noises when the oven fan comes on.  It appears that the fan is rubbing against the shroud.  These issues should have been identified before being sent out.  Customer Service has been wonderful to work with.  A technician will be coming out in one week.