I've got a Mountain Man prototype and love it. The steel took a nice patina after some use and rust hasn't been an issue so far, I live in a very humid area but keeping a thin oil film over the blade has worked great so far.
It's sharp, the handle is comfortable and the blade shape is quite useful, BUT the blade is quite thin (a bit thinner than an Eriksson #22). It's not a multipurpose knife, it's a great skinner and a superb slicer, but I wouldn't use it for any camp chores.
If you're taking a hatchet or something like that, this knife will work well, but I wouldn't use it as my main outdoors blade.