There is another thread going about the rear-wheel lock not working on a 60D. That made me curious. I have a 60D, 5D and Elan 7NE. I don't use the rear-wheel lock on any of them, ever. I tried it and don't like it. I'll risk the occasional mistake over not having access to the wheel when I want/need it. I assume the feature would not be there if lots of shooters hadn't demanded it.
Please comment about the rear-wheel lock. Do you use it: never, sometimes, always?