As a former 'Don user, I seriously considered them again when I upgraded to 2" filters, until I saw the staggering cost!
Further research showed that Chroma were just as good, better value (but still expensive) and they actually produced and manufactured Astrodon filters until a decade ago.
According to several forum posts on CN, sadly it seems that the new owners of Astrodon have let the quality control reputation slip as well.
