Very good, as you would expect from a lens of this caliber. An incredible crispness of the images, even compared to other L lens.
Along with a full-frame camera so it's good for parties when you want to get away a little bit without being too far away.
Very good lens. Using it for landscape photography and it gives amazing effects and depth.
Very funny lens to wear when walking in big cities, especially when it is large byggnade because you can get very interesting perspective.