the reviews do show, you need to activate them first

then in order to get them to all show up, the only way i have figured this out is to go to admin>configuration>maximum values

and change to a high number, increase the number as needed.

this may pose a problem in the future, or most likely will slow down your database.

also, when you delete the products, i dont know how to get the review to stay there. that is for someone more advanced to answer

hope this helped.