The fact that you have a VM backup does not mean you can recover from that backup. It may be corrupted or not bootable, even if the backup software did its job well. And the worst time to find out that you cannot recover from your backup is when your VM is down and you need to recover.
NAKIVO Backup & Replication provides an automated way to near-instantly verify VMware VM backups and replicas. After a VM backup is completed, NAKIVO Backup & Replication can instantly recover the VMs with networking turned off, wait until the OS has booted, make a screenshot of the OS, discard the test-recovered VM, and send you a report with the screenshot via email. This way you can not only trust that you have a good backup, but also see (and prove to your management) that backups are good and VMs can be recovered.