The plugin is great.
Some suggestions for the next version:
On the admin side on the Customer Reviews page, the attach post title is displayed and it could be a nice to have to display it as a link (url). It will save a lot of time.
This could be a good thing also to display each review on one line with a + to read the full review or edit button to display and edit the review instead of seeing the full review on the list.
I don't display reviews on the frontend, so for now I don't approve the reviews so they don't appear on the frontend. In my case a setting to disable-enable the reviews display on the frontend could be useful.
Hope you will offer translation possibilities for
form fields, errors messages, buttons and all other text that need to be translated. Otherwise it will require a lot of time on every future update to redo the manual modification into the code.