For Halloween this year, I wore the M10 in my collection as I wandered around my neighborhood soliciting candy. I felt the old M17 headache with the eye lenses pressing on my temple. I was not happy with the nose cup fit. It leaked significantly and fogged the internal eye lenses. It was clear that my face was too big for the mask and I hope a properly fitting M10 would be more comfortable and produce a better nose cup and facial seal. The breathing resistance was reasonable, but walking up hills still increased my labored breathing. I'm not in that bad of shape, so I attribute it to the inability to get enough air when required. The crazy look of the mask was a big hit and I was mistaken for "gamer bad guy" by all the younger folks. So overall success.
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