I've just started trying this filter out, and so far I'm impressed with the results. I have the individual ND/PL filters and I like this one a lot better — saves time and space.
Very useful! Greatly improve creativity!
Got the iPhone lens, the clip is very handy and thus can be used on multiple devices (given that we have lots of different phones and devices). The price is still a little expensive. I would love to get more lenses, the only way that is going to happen is if there is a reduction in prices.
This was the single best upgrade I made to my iPhone. Video of anything "fast action" is much improved! I highly recommend Sandmarc lenses.