This is for low end users who just want an organizer to fit in their pockets. You can also get different models like same one, for more memory, I have seen upto 256KB. Good thing is it can easily slide into your pocket and is also easy on your pocket. I have not found this in US till now, but available in India. Worth for starting. If you r looking at high end organizers then look for Casio PV400 plus or Palm like m-100.