ak_web - 9:52 pm on Apr 10, 2012 (gmt 0)
I believe these ratings don't make any good for the websites.
For ex. the person is searching what others are thinking about the hotel. SERP shows that the website N rates this hotel with 4 stars. That's it. Why this person would visit website N ? I would not.
100% of searchers will visit page without the rating. They just have to, if they want to know about the hotel. With the rating somebody will visit, but somebody will not. What for, if rating is clearly presenting in SERP ?
This is another attempt by Google to get information from the websites for free and provide it on there own website (in SERP).
I refused to add this microdata. And in fact any microdata, that can be shown in SERP.