After waiting 4 months, I finally had this new oven installed to replace our KitchenAid 27 inch.  I was using a private appliance business and needed an all-black unit that would fit after modifications were done and , unfortunately, made the assumption that the interior space would be equal.  It is not!!!!  It's like a mini oven with two tiny racks that can only accommodate one tray on each shelf.  I can't even fit two muffin tins on a single rack.  I just don't understand how the same cutout space could be sooooo tiny inside.  And now I see why it only comes with two shelves; there's not enough height for a third!