Seemed like a good item to have on board. Though my local waters are rather nutrient rich and visibilty is limited. I do get to spend a lot of time in waters of the Caribbean and elsewhere around the world where visibility is much clearer and the mask would be more useful. So I bought it and here is a quick look and test on how it works:
I'm pleased with the mask and will get to try it out in clearer warmer waters soon. If you know someone who has a GoPro or similar camera like the Swann Freestyle Waterproof Video Camera it would make a great gift too!