A good use is to let someone know you're "on your way". Define messages you can send at points along a trip to let someone know your progress, without having to take your eyes off what you're doing.
Another winner is to define a message of endearment, a good reminder to someone you're thinking of them. :)
New Feature! A method of selecting which messages to send immediately and which to prompt before sending. A user thought this feature would be helpful for those of us with heavy thumbs, or those of us that might accidentally send one without ALL the thought it deserved. :)
*This application collects no information of any kind. The application needs access to your contacts to pick phone numbers from and only sends text messages to people YOU choose.