If you have the choice find a unit with the fan/heating element at the rear instead of the top or bottom. Also square is easier to work with than round. I have the 5 tray version of this http://www.amazon.com/LEM-Products-Dehydrator-Digital-Timer/dp/B004VLKT3W/ref=sr_1_1?ie=UTF8&qid=1451493203&sr=8-1&keywords=dehydrator+lem Which is the LEM version of this http://www.amazon.com/Excalibur-3500B-Deluxe-Dehydrator-Black/dp/B002SHNIW0/ref=sr_1_2?ie=UTF8&qid=1451493100&sr=8-2&keywords=dehydrator+5+tray.