There's many reviews of this lens and my english is not good enough, so I will show you some shots which I took with this lens and Canon 1DX.
Pros - razor sharp photos (even at 200/2.8), versatile, quick af, weather sealed.
No cons for me (maybe a white color).
Aperture - f/2.8; shutter speed - 1/6400; iso 320; focal length - 200 mm
Aperture - f/5.6; shutter speed - 1/6400; iso 500; focal length - 200 mm
Aperture - f/2.8; shutter speed - 1/6400; iso 320; focal length - 70 mm
Aperture - f/2.8; shutter speed - 1/1600; iso 500; focal length - 95 mm (cropped)
Aperture - f/2.8; shutter speed - 1/1600; iso 500; focal length - 200 mm (cropped)
Aperture - f/2.8; shutter speed - 1/6400; iso 2000; focal length - 182 mm
Aperture - f/2.8; shutter speed - 1/1600; iso 6400; focal length - 123 mm
Aperture - f/2.8; shutter speed - 1/1600; iso 6400; focal length - 140 mm
Aperture - f/2.8; shutter speed - 1/1000; iso 6400; focal length - 102 mm
Aperture - f/2.8; shutter speed - 1/2000; iso 1000; focal length - 200 mm
Aperture - f/6.3; shutter speed - 1/500; iso 2000; focal length - 145 mm
Aperture - f/2.8; shutter speed - 1/400; iso 5000; focal length - 70 mm
Aperture - f/5.6; shutter speed - 1/640; iso 2500; focal length - 200 mm
Aperture - f/2.8; shutter speed - 1/800; iso 2500; focal length - 200 mm
Aperture - f/2.8; shutter speed - 1/1000; iso 2500; focal length - 115 mm
Aperture - f/2.8; shutter speed - 1/640; iso 2500; focal length - 70 mm
Aperture - f/6.3; shutter speed - 1/200; iso 2500; focal length - 70 mm
Aperture - f/4.5; shutter speed - 1/500; iso 5000; focal length - 145 mm
Aperture - f/3.5; shutter speed - 1/500; iso 5000; focal length - 200 mm
Aperture - f/4.5; shutter speed - 1/320; iso 5000; focal length - 200 mm
Aperture - f/4.5; shutter speed - 1/200; iso 5000; focal length - 200 mm
Aperture - f/2.8; shutter speed - 1/160; iso 3200; focal length - 70 mm
Aperture - f/5.6; shutter speed - 1/800; iso 1250; focal length - 200 mm
Aperture - f/3.5; shutter speed - 1/640; iso 100; focal length - 200 mm
Aperture - f/7.1; shutter speed - 1/800; iso 2000; focal length - 80 mm
Aperture - f/2.8; shutter speed - 1/250; iso 500; focal length - 102 mm
Aperture - f/2.8; shutter speed - 1/640; iso 1000; focal length - 185 mm
Aperture - f/3.5; shutter speed - 1/200; iso 800; focal length - 200 mm (cropped)
Aperture - f/4.0; shutter speed - 1/250; iso 500; focal length - 90 mm (cropped)