Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 'Serta' ??KoolComfort Memory Foam

I received this product in good condition although it was not in a Serta package and nothing on it to verify that it actually came from Serta. I purchased two 'original' Serta KoolComfort Memory Foam pillows at a Serta bedding store two months earlier. They are King Size. There was nothing in the Amazon description stating the size of the pillow except the picture when I ordered it. On comparing my Serta pillows with the pillows sent by Amazon, both sets of covers were similar. On examining the interior foam pillow itself there is a MAJOR difference. My original Serta King Size pillows have a Grey color foam where the Amazon pillows have a whitish-yellow foam and are much less pliable than my Serta pillows. This leads me to believe that the pillows Amazon sent me are not the same product as my Serta KoolComfort Memory Foam Molded Pillow. I returned both pillows to Amazon since I do not feel they are the exact item as advertised.