I have been using Listpro for about 2 years and it is great. In the past I have just used it for to-do lists. I still will use it for reference data. I have recently been implementing GTD and have been using Listpro. I have file called GTD with all my lists in it. I made sure all my NA lists have the exact same columns so that I can move NAs if needed between contexts. The columns are Item - NA - Notes. I have a seperate list for Projects and have heirarchys with items crossed off when completed. I have a calender file. I just input the calender item and then quickly sort the date column. It is very quick simple and easy to use and it syncs easily with my PDA

Steve