Honestly, since we monitor VMware-specific events with other tools, I have "turned off" the VMware stuff in SIM and disabled the discovery of virtual guests when a host discovery is run. I can't say there are good or bad points about this, we simply aren't using it. For us, SIM is hardware only, as you have mentioned. We didn't see a value in having guess in the database.. it just cluttered things up a bit.
