SimpleTask grew out of frustration with other to-do list applications. They all had too many fields to fill in, too many different views and ways to organize Things.
Other task lists, GTD apps, and to-do lists may be easy to use. Some have fantastic interfaces, others not so much.
SimpleTask is as easy to use as paper and pen and requires no learning curve. Adding a task is a snap, requiring only as much info as you have. If one word works for you, then it works for us.
Unlike other apps which add every task to the dock's red badge, you can choose which tasks are important enough to show up on your dock or iPhone homescreen.
Plus, you can Do It with a click. No messy "Priority Level" menus to click through here.