Nicna Pro1D filters, do you know them?

I came into these cheap Nicna filters which model names are omonymous to high regarded Hoya/Kenko

http://www.google.com/search?q=nicna+pro1d

I wonder if anyone had the chance to try them so that he could reassure me that the name is the only thing they have in common, not to mention quality.

What's more I noticed all eBay auctions read "made in Japan" while the Nicna factory is actually located in Shenzhen, China, as you can see from the company profile on this Chinese marketplace

http://nicna.en.alibaba.com/aboutus.html