I really appreciate the ease of use of the solution provided by Altaro. It is very easy to just install the software, or update it and then just set it up under 10 minutes to get your backups rolling. When you first start the sofware it even guides you in the first few crucial steps. The software will ask you to add a licence and then set a backup location and a schedule for all your virtual machines. Once it is done you just need to press "take backup" and wait for the magic to do it's trick.
You also have a lot of choice when it comes to where you want to backup your files. It can be on a local drive, usb drive, network drive. You can set an external backup that could be a drive rotation or even set yourself an offsite server to receive the backups at an other location very easily.