Instruct: Classify an Amazon review into positive or negative sentiment.
Query: McKenzie Cervical Neck Roll Support

I would wake up with neck pain through the night. After 3-days I no longer had neck pain. It took me a week to get use to the roll, but I now get a full nights rest and my neck pain has not returned. My Physical Therapist recommends the Neck Roll and practices some of the techniques in McKenzie's book.