Bests & Worsts Reviews from Amazon

I specifically chose this robe because of the high number of positive reviews associated with it. The robe itself is okay, although I'm not particularly impressed with the quality. However, I was angry when I read the note that arrived with the robe offering me free slippers if I were to leave a positive review. I know many companies offer incentives for people to review their products, but specifically asking for positive reviews without divulging the reward involved within that review is misleading and an abuse of Amazon reviews.