I got the same feeling with this vid as I did with the Zalman CNPS 9900 review. At first I was like

then when the mounting system was explained I went to

and then finally when it came to the price and the 10c difference in temps between the Dark Rock and the Noctua/Silver Arrow

.
Like Tom said, it's not a bad cooler but for the price and considering you can get a Noctua for a few pennies more I don't see why people would buy it.
Yes, it's black and would look better in some peoples opinion so it matches the color scheme or whatever, but choosing looks over performance is doing it wrong. That's my two cents anyway.