I just made a quick video review for the Atlona AT-HD620 connected to A directv box. http://www.youtube.com/watch?v=ABWi5JnLPPc You can basically connect all kind of devices using this converter. The image quality is good, but due to the upconversion you will see some video noise. The upconversion is one of the drawbacks, since you are not able to change the output resolution. The other problem is that you cannot really calibrate the IMAC display. But this is an IMAC issue. I ma very happy with the purchase. You can reply to the thread if you have any questions. I will be testing it with a Blu-ray later on.