I've always been a Canon man and have been using the 5D Mark IV for over a year now. For me in my work as a wedding photographer I find the low light focusing a major improvement on the Mark III. The greater dynamic range is especially helpful in extreme light situations and the touch screen allows for super quick menu changes. These factors alone make this my go to camera.
If you are new to Canon cameras, or new to photography, and want to learn about your camera's functions then why not book my private tuition class.