Useful:
-Three lists (work, family, and private)
-Reminder on Icon , Widget in Today View (know how many unfinished tasks in work and family lists without opening the app)
-Location based alert, customizable alert message, detecting range, and alert frequency (once or always)
-Share your work and family list by text message or Email

Simple:
-Pinch (Close two fingers) to add
-Tap to check or uncheck
-Long press to delete, modify or reorder

Extra:
-Set password for private list
-Extra list after entered wrong password


*Location based alerts may not work effectively for iPad or iPod that does not have GPS module