Summary: Blue flickering. Not sure what the point of having the adapter flashing all the time is... maybe for laptops where battery usage is a concern? But it isn't distracting the way I've positioned it, so not much of an issue.
Pros: I first tried two very cheap IOGEAR adapters (on sale), and had a terrible experience with both. In just a few hours of use, this TRENDnet adapter has put to rest all but one of the issues I had with the previous junky adapters. If it doesn't die after a few months, then everything is solved for me!
Cons: Tiny (but not the smallest I've seen). This makes it hard to unplug (which is not a common need).
Pros: Worked well with Windows 7 to download pictures from a Pantech Breeze III P2030 cell phone. I have used it twice now on two PCs. Install was was easy. (I followed the instructions and installed the device drivers FIRST.)
Summary: I decided to 'fix' it myself which required removing the PCB from the metal USB housing and fabricating a new housing as I mentioned mine was crushed beyond even remotely fitting into a USB port. I did manage to get it to work but because of this connection was intermittent and I would loose Bluetooth connectivity.
Pros: for what I planned on using it for it would have been great. It is one of the few Bluetooth devices that doesn't need bluesoile or an after market Bluetooth stack to pair and use wii-motes on the PC. All in all this was/would have been an amazing product.
Cons: I can't call it a CON for the device as much as it was the packaging and shipping. I received mine smashed... crushed really and the time and money it would have taken to RMA it would have cost me more than just picking up a new device.