I bought the Bluetooth version to use with a Motorola V551. Followed installation directions but Windows did not recognize the Bluetooth device. Called support line (in India) and they walked me through the driver issues. Then software would not run. Called support and they went through the update process. I managed to sync my Outlook address book, but the PC froze when trying the calendar. I also took the Bluetooth device out of the hub, and when I put it back in, the drivers had vanished. Once again called for support. Once again reinstalled drivers. They said that the software would not work with my version of Outlook Calendar (2003), so I should rather use an older version of Outlook. I decided not to do this, and I am waiting for a fix from Motorola. In the interim, I have not been able to transfer any ringtones, as the software does not work properly, and I only managed to send one photo to the phone (before the software stopped responding). I will have to call support again to try and find out what is wrong. This is potentially a great product, and I have enjoyed using it the couple of times that I have got it to work. Until they sort out the bugs though, I suggest that you stay away (especially from the Bluetooth version).