The feature that I have found most valuable is that it is easy to deploy.
It is also easy to configure with the vCenter and the other solutions that we have. It is easy to create and delete virtual servers. It is easy to create the load balancing and the clustering, and the new version includes different features that allow us to quickly see what happened if we shut down a virtual server. It is an arrays of disks. It works like a RAID file. You shut down one server and you can start the two others that work together.
VMware vSAN is better than SimpliVity. We once tried to run SimpliVity, but it was difficult for us, because the people from HP were not easy to work with, the costs of their white papers where higher, and it was not as easy to deploy as VMware. VMware vSAN also costs for licensing, but it costs less than HPE SimpliVity and I'm not depending on the HP team. I can run it myself with my engineers.