All the apps mentioned are good. For ease I've found Mobilse and Melon quite user friendly. I like that Melon allows you to add toasts to your notes, so anytime that you have to unlock your phone a small sticky of your note pops up on the home screen for a sec or two and then disappears. I mostly use these two along with Astrid and sometimes gtasks. All of their strenghts balance out their weaknesses, but I look forward when someone can develop an app that intergrates all of these functions, such as home screen widget, toast reminder, sync with gmail calender, voice reminder like the one found in action complete (also good), notes and advanced planner capability both with reminders into one. "I'd buy that for a dollar!"