yes i did. its funny, the damn thing ran better with my GTS than a GTX on my system, the game was very CPU bound. Most MMOs are anyway, with all the network use. My performance actually went down after SOE had the game for a year. I recall they removed some graphics features and did performance improving which outside of hitch improvements hurt performance on my system.
SLI has always been hit or miss on whether or not a game would benefit from it or actually suffer compared to a single card. So much to the point that it's pretty much a dead tech now because the amount of games that benefit from it at this point are less than the ones that experience endless issues because of it.
I'm usually careful and almost never fall for a scam, but when I bought a 2nd card for SLI, and realized it never worked with the latest games (always seemed to be patched in a year later) I realized I was duped ;\