I'm basically posting this for the benefit of future googlers, because I had trouble finding any information about this company, and so ordered from them with a little trepidation (their inventory and quoted prices are really good, and their web site has a certain clunkiness about its interface). I assumed everything was *probably* OK, but after having been burned once or twice by unscrupulous merchants in the camera-accessories business, I was left just a little nervous by the absence of information.
In fact all appears to be well; I got an email receipt immediately upon ordering, and the package of filters arrived today: timely, well packaged, matching the order, and with a nice little handwritten "Thanks!" on the receipt. So for what one experience is worth, there it is: I had a good one.