What are the benefits of AD integrated DNS?

A few advantages that Active Directory-integrated zone implementations have over standard primary zone implementation are :

1. Active Directory replication is faster, which means that the time needed to transfer zone data between zones is farless.
2. The Active Directory replication topology is used for Active Directory replication, and for Active Directory- integrated zone replication. There is no longer a need for DNS replication when DNS and Active Directory are integrated.