Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BEST SLEEP EVER!

AMAZING! It took me about 5 min. to take this out of the box unwrap it and put it on the bed. After adding sheets I laid down and was in heaven. It has made sleeping more incredible and comfortable on a nightly basis. I have mild back problems and was constantly waking up with pain even with a great quality pillowtop mattress, adding this to it has been the perfect fix. This is well worth the money. Great deal. Stop reading reviews and buy it!