The assembly is not the easiest (instructions in English, many different parts, hard fan set properly). But apart from that, it is a monster rad! It is terribly efficient and quiet VERY! Passage of a stock intel rad 80 ° C to 52 ° C burn, and quietly (i7-4770k) => great opportunities overclocking (i7-4770k spent 4.7 Ghz)
Even at 100% fan 140 is barely audible, I highly recommend it. (Of Dispel best ratio / Noise a Noctua)