Thomas J. Devereauxwrote a review of Montrail Mountain Masochist Trail Running Shoe - Men's on September 23, 2010
I started my trail running way back when with the Continental Divide then the Hurricane Ridge, back to the Continental Divide. Continental Divide was a great trail shoe but I think the Mountain Masochist is just as good if not better. I run 3 days on the road and 4 days on a very ruff trail (lots sharp edged rocks) and the Masochist so far has handled very well.I have yet to roll an ankle so I can say I like the support. I just bought the Masochist GTX for winter trail running and I hope they do as well as the Mountain Masochist.
PS: I have not yet run an Ultra trail race in the Masochist but I bet they do well.