The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
The features listed on the shopify page are actually not there. Says your vendors can set up the class/product, but they really can't. I think given time, it will be a very good app but not at the moment. Still needs a lot of work.
Thank you for your input. A new version of this app has been released and supports the vendor-shop relationship. It was always intended for the shop to set up product, not the vendor.