Certainly an out of the box method to be notified of a failover. As mentioned it has some issues, but certainly could be part of an overall plan. I don't have experience dealing with clusters, but I do like the method provided by Tim Ford over at msssqltips, http://www.mssqltips.com/sqlservertip/1663/auto-notification-for-failover-of-a-server-and-restart-of-sql-server-services/ a little better.