1. It helps in monitoring real-time location of the vehicle.

2. It gives important information alert such as maintenance issues, including engine load, fuel usage, coolant temperature etc.

3. Real time tracking feature helps in vehicle recovery in case it is theft. Review collected by and hosted on G2.com.

Major downsides are:

1. Privacy concerns owing to continuous monitoring of the movement.

2. Creates difficulty in deriving relevant insights due to overload of gathered data.

3. It is costly and complex.

4. Requires power source for operation. Review collected by and hosted on G2.com.