Not running it but thoughts are that this is a good single card solution for those that don't want to double down to max out the memory. On the other hand if your purchasing now just grab some 580 3GB's. I'd look for better mobo support next year with the new revisions if you have not already upgraded recently.
I'm running the 670 FTW edition, and I like it. If you do buy it, however, you'll need to wait out better drivers and underclock. the 301.42 drivers are having a hard time with any OC'd cards, including stock overclocking. I'm running mine 1025mV's and just over 1100mHz clock right now.
“I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.” -Albert Einstein