I check mine occasionally, I mainly get overspeeds last most of the drivers.
It’s silly because it will say overspeed for 49 secs at 54.52 mph at m25.
Anything over 54 mph is overspeed at my place.
Sometimes the trucks get set to 56 mph though so if I’m in one of them I can easily pick up 2 dozen overspeeds in a day. 
The system is stupid but I’ve never had any grief regarding it so I don’t mind.