We moved to Trend mico too, for the same inexplicable reasons. As S0lo said the client side is simplicity itself. However although the product does scale up to enterprise-level I've found it clunky and inflexibkle when administering large numbers of servers. Also for thier enterprise approach to work your network must be connected to the internet (it wil then download and distribute its updates automatically). However if your network is isolated and you want to download updates yourself then still deploy them automatically then expect pain and suffering as you'll constantly have to defeat their arrangements. You can of course delpoy manually but that to me defeats the purpose of buying an enterprise-capable system in the first place
