Hey Bijmin,
I just replied to your email, but wanted to answer your question here too in case anyone else had the same question.
Unfortunately it isn’t possible to display Facebook reviews with the plugin at this time. Facebook’s API for page reviews has a different set or permissions and restrictions set on it which makes it difficult to access without jumping through a lot of hoops. Because of the complexity involved in allowing each user of the plugin to display page reviews we haven’t been able to integrate it into the plugin yet. We’re still looking into ways to achieve this and are hoping it’s something we can add in the not-to-distant future. We’ve had a number of requests for this and so it’s high on our priority list.
John