Summary: I bought this card last month and have been using it almost daily. Unfortunately, the card runs pretty hot. If you don't have several fans in your case, this is probably going to cause you some problems. Proper airflow aside, the card itself is amazing. Like another user said, it is a whopping 12 inches, which means most small and even some medium cases aren't going to cut it. If you have the cooling for it and the case, it's a wonderful thing.
Summary: Could not get this card to work properly. Sent this back the day after I got it. Tried to run Hitman:Assanation and other new games but would not last for more than 8 minutes of gameplay. Any increase in frequency would cut the card off and restart the driver. The only reason I didn't give this 1 star is because I'm sure the "good ones" work, but obviously there are "bad ones". DO YOUR RESEARCH before buying.
Summary: It arrived sooner than expected and was well packaged. I plugged it into the top slot in crossfire and fired it up, only to see the temps go to 105 C! I voided the warranty and took it apart. It is held together by only 4 teeny tiny screws that were not very tight. There was too much thermal paste and it was a very thin and soft type too. I applied new paste and tightened those screws down and it now runs in the 85-90 C range under full load.
Summary: maybe i got a bad one, but mine overheated and overclocked poorly. i payed a huge premium for this card because of the potential overclock but what i should have done is bought two cheaper cards instead