Veeam is the product that I love to use for backing up virtual machines. There are a lot of products out there that can accomplish this but Veeam has always had some great features to bring to the table. Top amongst them is their UAIR functionality and their ability to recover file level data super-fast!
Veeam 6 has a new architecture and some great new features. If you’re a VMware fan, i highly suggest you check it out!
You can read more about it here.