I tried using mine with both MS Streets & Trips,, and Street Atlas. I like the MS interface better, and it has more roads than SA, but the GPS support is lacking. I am having problems making the GPS emulate serial and usb at the same time. The SA wants USB, and the S&T requires Serial interfacing. Unless there is a fix. I will have to check on that.
I too would like to have the PDA version, but I have to have alot of maps available. I install Direcway, so I am always being sent to a new job after finishing the first job. Sometimes go 400 miles in a day.