OCIA has posted a review of this cooler for the Intel socket 478.  They are getting some decent performance for the price, and it looks cool too.
“Installtion of the 4ProL was one of the easiest I’ve ever done, even
easier than Intel’s retail P4 heatsink, which has been praised by many,
including myself. Installation of the 4ProL was as easy as adding some
thermal compound to the processor, placing the heatsink between the
retention bracket, and pushing the 4 clips onto the 4 retention posts. The
clips only require a little pressure to seat them into position, and makes
the heatsink seat firmly to the processor, without using excessive pressure.”