I'll pass. I think I accidentally rotated the mode dial only once so for, across the three bodies and 1+ years of shooting with them. But there have been a lot of time when out hiking with my 7D that I see a bird flying by unexpectedly, and a quick spin to the end (C3 is my BIF setting) allows me to get the shot. Inserting an extra button press into that process would hinder, not help. I have accidentally rotated the QCD on occasion and applied EC, so the lockout there makes sense - but it can also be easily enabled/disabled at will, unlike the locking mode dial.


But since they put it on the 60D and are offering to retrofit the 7D and 5DII, this may become the new standard for non-1-series bodies.