I have used Delorme 2004 and 2006. 2006 is much easier to use than 2004 for directions and such but its kind of hard to use on a small screen. It's nice too if you miss your turn it will reroute you after a little while.

Anyone compare this to IGuidance? I would like to know specific advantages and disadvantages.

Also it would help if people said why they like one over another if they have tried more than one. That seems more useful.