Regarding its use: it is perfect: image TOP broadcast directly on TV by just plugging, though the sound is not automatically transmitted: he only had to go into system preferences, and select "TV" to the sound is broadcast on TV.
So why bother to pay more for a product "Apple" more than 30 when he was just over 10 ????????
ENJOY ENJOY and product :)
PS: It should be said that the delivery was perfect! As usual I'd like to say;) Never hassle with Amazon!