I'm a first generation Canon 6D owner and user for about 4 years now. I did a fair bunch of photos with it, but I started looking for upgrades.
Few weeks ago the opportunity arose when my multi-control button stopped working after being exposed to light snow. Before jumping to buy a $3000+ camera body I decided to rent one for the weekend and weight the pros and cons between upgrading and repairing my camera. So these are my thoughts on the 5D Mark IV coming from a 6D user perspective: