I had Widcomm, but gave away my BT dongle. Got a new one and Widcomm didn't like it, so I got Bluesoleil.

Both are fine, I haven't found anything lacking in either. I say try both and use the one you prefer. Be warned, however, that they only work with specific brands. Bluesoleil has an evaluation mode that limits your transfer to 5MB but works with most brands.

The one that comes with Windows XP sucks big time. You can't transfer many files at once without clicking "Next" three times on a darn wizard.