Yes I use, and resell that card in its Expertvision form.
Good to see another review of these cards out there.
I posted another review a little while back. For those who missed it, it's
here
Also, PC Powerplay (One of the biggest PC oriented gaming magazines in Australia) included the Expertvision in a mini review/roundup of cards in their August edition (yes, magazines come out a little ahead of time down here)
click
About volt modding these cards, it's been discussed at some length in various local forums, and IIRC a guy going by the handle of Graham found a way to volt mod them. I think you need to check at overclockers australia forums. Personally, I have no intention of modding mine.