The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
Works great if you are careful but if you add HTML code into visual window it may cause a fatal error. Deleting the app will not resolve due to data being stored in database. Reinstall brings bad data back.
Be very careful to click source code before adding code. It was a simple tag which caused the error or an incorrectly written Anchor tag. The app did work great for 5 minutes.