So gps speedo arrived today..
Did test in the car..
Aceleration looks good, its follows my slow car..
Decleration.. Well there is lag between 30 km/h and zero..
When car stops, it take 2 seconds to reach zero.. Looks like it can go down 15 km/h per second..
On greater speeds its looks better..
Now, plan is to kick out original speedometer form bike and try to fit in this one.