I love mine. My hypothesis has always been that these are made in the same place as the others, but I don't think there's any way to know without traveling to China, Australia, etc... and that would defeat the purpose of saving money. There's another long thread about those snorkels and I don't think anyone has had any real problems with them.
I think ARB had a warning on their website about these knock offs. Something about the plastic not being the same. My issue is ripping off someone else's design, if that's the case. At least other snorkel makers came up with their own design.