It is so good because nobody actually has one yet ...
The only "preview" that I know of came from xtremesystems. Apparently a couple of people there obtained samples early and had very impressive overclocking results. The list of BIOS options and voltage settings that they had access to were beyond what we've yet had available in any stock A64 NF3-250 board. If those same features/bios options are available on retail boards, the DFI board will likely be a very strong overclocking option. I am interested in this board, but I think I will wait a bit for more information before I jump. I think...
Other reviews and feedback from users should start happenining soon. Apparently there was an option to pre-order the board with shipping scheduled for ... today. I don't know when other resellers will have it in stock.