It was a pain for me to get the two to pair and I spent 15 minutes or so messing with both.
Of course, by the time it finally worked by accident, I found that it could only work as a modem, and you can only do that unofficially while having PowerVision.
I needed the USB cable to transfer music effectively. You can transfer files over Bluetooth, but they go into a folder from which I haven't been able to move anything. The File Manager application should be called Erase Manager, since it only seems to erase.
iSync doesn't support any Samsung phone and even Sprint doesn't allow you to set calendar events from their website.