In reply to ianstevens:
Haven't used the 7DII but have had a 7D for four years or so and have been pretty happy with it. The high frame rate is great for action - especially things like a skier coming towards you. I don't use it for much else but guess it would work for a climber falling in one's general direction too. It has survived use in some pretty grotty weather and cold temps have been no problem. There used to be quite a few comments from people struggling with the AF system and it's worth putting in a bit of time to figure out the options you'll use and turning off the ones you don't want - I expect that'll be even more the case with the MkII and all its extra AF points. The 3 custom settings on the mode dial are really useful and can save a lot of fiddling around, taking gloves off etc.
Most of the shots in here
https://www.flickr.com/photos/63191472@N04/albums were taken with it. Hope that's some use.