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.

[EX Q]: Since I badly need the 4:3 ratio for FPV flying, I will keep this unit. However, the USB power supply failed after second time I inserted it. Total junk design. However, opening up the unit, the connections for the supply are pretty obvious, and I think I can fix it. If you are not good at soldering iron, stay away from this equipment like hell, there is no way it would last longer than a couple of days, and there is a clear manufacturing failure. As far as quality (video) is concerned, it seemed to be OK, I have not noticed any major problems during the half-hour I was able to test out the unit. Quality is good, 4:3, 16:9 switchable, as advertized.
[EX A]: negative

[EX Q]: Reading this book felt like a puzzle set out before me. I had all the pieces early on but didnt know how they fit together. The author takes your hand and leads you down an amazing, glorious path, explaining the need for each piece. The end result? A master piece.
[EX A]: positive

[EX Q]: This candle has no scent. I bought this because my last experience with this company had been good. Previously lighting the candle smelled like baking cookies. This new candle smells like nothing.
[EX A]:
negative