Not bad. I personally like the ASUS Matrix cards for the 4850 and 4870. They are a little pricey though, however the software with them is good and they have temp diodes on the GPU, memory and VRMs. Kinna wish I had 2 of them instead of these IceQ's.
Some of those results are a little skeptical though. The regular 9800GTX does not beat up on the 4850 like that. And I just dont see this card beating a 4870, espically considering the 4870 and GTX 260 are about even within a few single %. Its just a custom PCB with a new cooler, the review site is pumping up it a little too much.