Sorry to make you take an extra click, but this was the only way I could get you to my Amazon page, where I've reviewed well over one hundred items, many of which were items sent to me via the Amazon Vine Program.
What is the Amazon Vine program? It's an invitation-only program for reviewers based on the helpfulness of their reviews. It's not only for books; as a matter of fact, if you click through you'll find I've reviewed crockery, gadgets, and watches. I've noticed that my positive reviews tend to garner more positive votes than my "eh" or negative reviews. I hoover at about an 82% approval rating, so I'm not quite sure how I was selected, but I enjoy being part of the program regardless.