The HUK has scripts to configure HBA timeouts and iSCSI timeouts which is useful (except ESX which is done ideally through VSC now) and the "sanlun" commmand which is useful for troubleshooting. The DSM isn't often needed anymore with native MPIO on the OS. But the NetAppp DSM is a nice mpio for Windows that is consistent for FC/FCoE/iSCSI.