This lens was DOA. It really needs to be around 749$ for me to ditch my 24-105L.
This lens is badly overpriced for what it brings to the table. I think Canon is going to be forced to dramatically drop the price in order to sell these things.
EF Lenses: 50mm STM, 300mm f/2.8L II IS, 16-35mm f/4L IS, 24-105mm f/4L IS MkI, 70-200mm f/2.8LIS II 600EX-RT (x3), 1.4xIII and 2xIII extenders
EF-M Lenses: 22mm f/2, 15-45mm, 55-200mm