Very comfortable, great vision, quick change lens system is nice.
None for me. Some don't like the style, but i do.
Great mask. Best available for my money. Very comfortable, this mask feels essientially the same as the proteus which was already a very comfortable mask. FIELD OF VISION-The 290 degree field of vision is awesome. Noticable better than the proteus or any other mask i have used. Lastely the quick change lens system is very convenient. Great for quickly cleaning off a very dirty mask or swapping in a new lens.
This is the best mask available. Comfort, vision, ease of use. What more can you ask more? Go get one.