Used with a MacBookPro 13 "mid-2009 (which does not support sound output via cable Mini Display => HDMI in several forums) Works great (in Leo), there or converter my old Mini Display => HDMI was broken (drop frame) Although there was no son, in a sense, it's not so bad, because the fact of the jack plug (moreover optical!) Switch automatically sound to it, no need to go tweak every time his preferences with other cables. Level definition, 1080p @ 60Hz is supported, perfect image, digital sound, short but good, and all for a price very affordable. The only point to see over time is that the housing heats a chouilla ... Otherwise I'd recommend it without a problem.
Small problem: latency time palpable, a hundred milliseconds, which causes a slightly shifted back mouse. I do not think it's of the same product, but to HDMI conversion. Préfrérez VGA use for office use.