I too like the 5MX but PsiWin killed the product in my opinion. It was just too hard to use. Every 6 months I try to do something with mine and give up after a few weeks. It usually comes back to problems with PsiWin. Last time I really wanted to use it just for documents but it is too hard for me to mail them directly from the Psion with my ISP/work set up. So I would have to transfer them to another device to send and that didnt work well. So went my last attempt at resurrecting it.

I just got a Palm Tungsten 5 and a Thinkoutside IR keyboard. I think it is a much better solution.