This mask is pretty much as advertised so far. I have only used it a couple of times now, but after filling the inside of the mask with fresh water and rubbing the glass with my fingers and then rinsing quickly, I had no fog build up the entire time I was snorkeling! I have not used it Scuba Diving yet, but imagine that I should have the same result.
Perfect BCD for travelers! I mostly travel to dive and I never travel light. This BCD fits into a carry on luggage well. When I tried this one, I don't want to buy other ones because the reliable quality.
It is a perfect mask for Asian faces! That's the one easy for me to equalize because the nose fitting is great. I and my friend both love this mask and got exact the same ones!