look around the web, you will be surprized to find that not all of them are any good.
People are having problems with installation and some of them are limited as to the number of different items that can be attached or controlled by the adapter.
Read some of the reviews such at cnet.com, pcmag.com, etc.
I think JR's prices are too high - look at Cnet.com, pricegrabber and other price comparison sites........also look at newegg......buycom, etc.
So far I'm leaning to CNET Inc.'s CBD021 at newegg for $ 23.00 or CBD101 at buycom for $ 26.40.