Just today we got a bucket of premixed cement (we need to patch some spots before painting our basement) from
Amazon. The box was wet, the cement had leaked everywhere inside the box, and the product was unusable. I got online and started a chat with a representative, who kept typing to me to return it to the nearest Kohl's. I had to type three times that the product was everywhere and could not reasonably be returned before it sunk in with the rep. Finally, he got the message and refunded the full amount to the credit card we used.
As to reviews, I *always* leave one if it's needed. I left a 2-star review for a comforter set I bought that pilled up after only 1 wash. I also leave one if I'm happy with what I bought. Sometimes, it's a little impossible. I just bought a hole puncher from them and I got a notice to review it. It's a hole punch. It punches holes in paper. Not much else I could have said.