This is a great deal. I bought one on a similar deal last year and it's running out now.
Note: There are two separate rebates. One is a $40 regular rebate, and the other is a $30 competitive upgrade rebate, which means that you have to send proof that you had a different anti-virus program, for example, a photocopy of the disc or the first page of a user manual. Also, my rebates came as two debit cards ($50, $20).