It's a bit on the loud side. Even though the dual fans were designed to run quiet, when they start nearing the 50% level and beyond, they are easily the loudest component in my computer. My wife definitely noticed the difference the day I installed it.
Extremely fast; The super-clocked version of the GTX 780 rivals Titan speeds; I'm able to get over 60 FPS in FarCry 3 at ultra settings at 1920x1200.
Expensive; Sticker shock was strong because typically, in the past, I've purchase 2nd tier Nvidia cards; (570s, Non-Ultras, GTs); But that's my choice and not a negative on the card itself.