This is a great lens and I love this one.
For stitching panoramas (two or three shots), one has to shift the camera (not the lens). Yes, this was already mentioned above, but the review should have had an point here to address it to Canon, that a mount-option is missing for that. This mount-option would save 50% of the work that needs to be done right now, which means the need to move the camera after shifting the lens. (Time is critical for some objects to shoot, so this double work is not fun).
If Canon Rumors continues to review lenses, (thanks and very much appreciated), please include some points how usable a lens for video work is. Is the lens breathing while adjusting the focus, did the color matches with other lenses from the series, is the image stable while pulling the focus or even zoom. How is the focus ring set up, very short on the end or very wide. Important points I think, and most lens reviews ignore that point.
Thanks for a nice review.