I've got my dehydrator machines retrofitted with a total of 4 floors to the maximum height of 8 and am very satisfied. I suspect that the product will only be purchased by customers who are already familiar with the dehydrator machine. They are the same levels as in the original device. The dried result is no different than with 4 floors where I would recommend the floors at about the mid-term to replace once from top to bottom (for a more uniform result dehydrator).