I used mine for two weeks snorkeling in Hawaii. It isn't perfect. It does take on a little bit of water sometimes when you go below the surface, but it isn't enough to cause any problems.

It is pretty easy to clear by just giving a hard quick blow. You probably won't find anything better.

I bought this snorkel and used it and I must say that it is incredibly good. No water gets into this thing! However, my friend bought the Aeris Barricuda (The Cuda Dry) and we put them next to each other and they are EXACTLY the same product with only the painted-on brand name being the difference. I mention this because the Cuda Dry is $10 cheaper. Consider yourself in the know...