How to copy data from a Master PXC to a Slave PXC

I suppose this https://www.percona.com/doc/percona-xtrabackup/LATEST/howtos/setting_up_replication.html
would be the right way to do.
I will try and let you know if works.
Is there a way to check that master and slaves are aligned perfectly when they are online ? or i need to verify them shutting them down ?
Claudio