The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
Their customer service answers fast but on the other hand, I was facing a lot of issues with this app. I have paid my monthly subscription and the app has never worked properly. It made me more issues and bugs than something plus. When I told them to remove all code from my theme they left not even some lines of code but also a full snippet or template. It could be a great app but it seems to me they need better developers somewhere in their Dev office.