In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

Q: I absolutely like it The brain booster influences well on my alertness and memory. I feel much more clear after half an hour of taking them. I think that they even improve my critical thinking.

A: positive
****
Q: When the ache/pain in my upper back won't stop, I always turn to this product. It takes away the pain almost immediately. It is adjustable and comfortable to wear. I love it!!

A: positive
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Q: First for the pros of my product. The respawn 110 is an amazing chair, really comfortable, love the fact it fully reclines with an leg rest, comfortable after hours of gaming, over all great product. Now for the cons of the product. Inconvenient to pull out the leg rest, you cant adjust the arm rest while laying back, needs better lumbar support while sitting in an upright position for a extended period of time. My conclusion of the product is a great buy for any gamer, or just to have as an office chair.

A:
positive
****