Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Did not meet my expectations.

I saw this first on Oprah and guess I should have known better. But I tried it. It was WAY too thick for me, uncomfortably so. And though I purchased it mainly to help with migraine headaches, sleeping on it one night actually gave me a migraine. This seems gimmicky to me. I don't recommend it at all.