Pros: I have two of these, they work fine for streaming audio from desktop/laptop to a Jabra bluetooth headset. Transfers files to and from Samsung Galaxy S quickly. No problems during setup, Windows 7 found the device and installed drivers without problem.

Cons: Range isn't great but I believe that's more a bluetooth issue rather than a device issue.

Overall Review: My guess is that a lot of people that have trouble with devices like this are actually experiencing computer or software/device driver issues rather than device issues. Know what you're getting, know how to use it and if it doesn't work learn how to fix it.