It should have one more sliding shelf and there should be more space between the shelf & the heating element  As well ,my lungs can put out more air  than the "convection" air this little guy can blow   I'm going to write to black& decker to see if they have a better instruction manual than the "insert" that came with this machine Please reply  to me about what you think of this  review  It's only fair  to share your reaction/opinion