This a GUI that allows you to Backup ESXi 5.0 or ESXi 5.1 hosts to a destination of your choice on a local drive. It also allows you to restore ESXi Host configuration bundle backups taken, to other Hosts.

The main improvement introduces a function in the script which backs the GUI to check that ESX hosts are valid before attempting to backup or restore these.

Very cool tool and useful:

ESXi Host Backup & Restore GUI Utility