Summary
Using the Scheduled Task Wizard makes sense if you are working with only a few servers in the same location. If you're working with many distributed systems, consider focusing on the AT command because it is capable of creating a server to provide you with a single view of all scheduled tasks throughout a network.
If you are an advanced user, you will find the advantage the Scheduled Task Wizard has with its capability to load and run shell scripts. Go to the Programming section of InformIT for many useful articles on shell scripts and PERL programming.