Comment by econ
They don't have to tell you anything. Just unbox and show what they got.
I just purchased a bicycle chain cleaning device. It was absurdly cheap. The plastic was extruded poorly, it was hard to assemble, it was not entirely obvious how to use it. However! It did the job and it barely got dirty. I expected it to be full of rusty oil both inside and outside but it accumulated just a tiny smudge on the inlet. If anyone made a video it would be a fantastic product.
God, the flood of absolutely useless "review" videos Amazon has incentivized customers to shit all over their site which are nothing more than unboxings are the worst thing about that ecosystem. No thank you.