Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not very sturdily constructed

Received the pillow and was pleased at the sturdiness and comfort - after only a week a corner seam just unraveled...nothing like waking up to a bed full of fluffy "down gel" fiber!Not really a big deal but I shouldn't have to get out a needle and thread after owning something for only afew days - the low rating is due to principle.