Works okay with a Silvia Multinavigator, with the serial adapter cable (which I had to buy separately) and an Aten UC-232A Serial to USB adapter.
I was able to get a realtime fix.
I was not able to use other functions like uploading or downloading waypoints.
But it's a nice start.
I'll keep playing with it, I don't know if I really have enough need to pay for it. Although I think it's a reasonable price.