If you own one of these (or know someone who does), let me know what you (they) think of it. I've got one coming and am really looking forward to playing with it. It's actually sort of an "old" product now (originally released 2-3 years ago), and I had to pick up a Visor Deluxe to use with it because they don't make one for my Tungsten, but as nearly as I can tell it's a stable product that works well.
They also offer a new stand-alone unit that doesn't require a PDA, but the PDA module is much cheaper and more flexible (again, as nearly as I can tell) -- I guess the trade-off is the size, which might be an issue at some point.
-------------------- The first rule of holes: when you find yourself in one, stop digging.