Hello suhag79,
"Anyone is using the vSAN health check plugin."
Everyone is using the Health plug-in (or at least they should be), never seen a customers environment that wasn't using this on a daily basis - vSAN has so many elements and different layers, the Health-check allows easy monitoring of this.
This checks so many things that would be near impossible to keep track of constantly without this and new checks are added to it pretty much every release:
https://kb.vmware.com/s/article/2114803
If you want to get a feel for what is in the Health check just deploy the vSAN 6.6 HOL lab to check it out:
http://labs.hol.vmware.com/HOL/catalogs/catalog/
Bob