Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ronco 5 Tray Food DeHydrator

I purchased the Ronco 5-tray food dehydrator (without the fan) and I warn all others out there to NOT, I repeat NOT, purchase this item. After using it for 3 days with rotation of the trays and constant supervision, the trays ALL warped and two of them even had burned holes through them. The customer service at Ronco was not helpful and very rude so I will not purchase Ronco products again. You would think that a food dehydrator would be made to withstand the heat....DUH!!!! I wish I had read these reviews before purchasing as it seems this is a very unanimous opinion. The American Harvest dehydrator rocks!!!!!!!