I've got them, but not in my powerstroke. I've got the dual setup in my '98 Grand Prix GTP. Mine were I think from an early batch (maybe the first?) and some changes have been made to them since that time. I got them in June '05
I like them since I can get 4 readings from just a 2 gauge pod and can just hit the button and switch through all the parameters at will.
A few of the changes are the analog inputs, good for an EGT, and mine also gets power from the ODBII port but now you have to tap into another power source.
I'm thinking about getting them for my new to me '05.