PCGamer has a review of it in the latest issue:
"Hercules adds heatsinks to each memory module on its card, as well as an extra heatsink for the core that attaches to the board's underbelly. While long- and short-term mileage may vary from card to card, we were able to crank out an amazingly fast 372MHz core and 702MHz memory from ours, which equates to a 3DMark2001 SE score of 13,514 on our benchmark system, up from 13097 with default clocks. Furthermore, at that speed, Game 4: Nature jumps from 98 fps to 111 fps. The bad news is that even though the card ran without lock-ups at that speed, we did notice a lot of artifacting. We had to bump the memory back down to 670MHz or so to prevent it, but still managed to retain the lion's share of the performance boost."
According to them it's $29 over msrp of ATI and Crucial cards. I don't think it's worth it in my book. If you can find a standard 9700 for less than msrp, this one's still gonna be $429.