Why would you recommend the Excalibur Dehydrators over the American Harvest brand?

We have used the american harvest, and noticed I had to rotate the trays alot, and the trays closer to the bottom got hotter than the ones on the top. (uneven drying). They are nice because you can expand them.. unlike the excalibur.. Also the "solid" sheets on the american harvest were a thicker plastic not the thin teflex, and were not as non-stick.. which may have an impact when dehydrating certain items.. Cleanup in my opinion is easier on the excalibur, since the mesh sheets are removable, on the american harvest, the whole tray must be washed.