I have had the filter for about two years and the day I visited the park when I took this image I thought I had put on my ND filter only when I went to change it after to do some landscape shots I realised I had used the glimmerglass, when I uploaded them to pc after getting home I quite liked what it had done, so I have used it a couple of times since and it seems to work ok on certain subjects, it also works pretty well on waterfalls too