I have the Atomic frameless medium mask with clear skirt and like it most of the time. When I say most of the time, I had to get used to the light reflection from the angles that the lense is cut because the lense picks up some glare in bright light with the clear skirt. The skirt is clear enough that I can almost see through it, which is good sometimes, but not all of the time. This could be cured by buying the Atomic with the black skirt.
Additionally, the regular size Atomic frameless was slightly too big for my face, but the medium size is almost too small, so I have to make sure it is centered on my face just right. With my moustache, it always leaks a little bit anyway.
The Atomic is a very high quality mask, and you can tell a slight difference in clarity, but I don't think it would make or break a deal for me. I'm going to try another similar mask which is the Tilos Excel with black skirt to see if it fits better. Fit and comfort is much more important to me than near perfect clarity. I may keep the Atomic for darker water conditions and it will remain my primary mask if the Excel doesn't fit right.
If you buy the Atomic, then I'd recommend the frameless with black skirt and the size that best fits your face. The mask is very light, low volume, easy to clear, easy to pack, and has good visual clarity. If it fits right, then it's worth the money to me.
