Hi,
I have good experience in web development. I am going to implement the following steps in your project,
1) Create a section called Reviews there you can create the 5 reviews and you can edit the content anytime.
2) Create a Email template section, it will send mail to customers with a automatically created..
3) Create a email template with those reviews you created. You can also edit it in editor.
4) Integrate the FB share button in mail template. So users can post and also they can add their own words while posting the reviews.