FYI - It only scans the first 5 VMware Hosts found from what I can see. So you would need to point it at each server individually in a larger environment. They want you to buy VMware operations manager to lift this restriction! Still, not bad for a free tool I suppose. One other great free tool I've found is Veeam One - gives a great dashboard view of environments with multiple vCenters and half decent reporting, and this is all in the free version!