I mostly use the to-do function (my BB had a to-do app with it but when I got the iPhone I had to find an app to do the same thing). I like it; its useful. Dont use the grocery list very often (takes longer to type items than to just write them on paper) but overall I find it suits my purpose.
Jen corrected to Ken about Organizer To-Do: Daily Planner, v2.4