I occasionally carried a few individual filters with me. But it was often too time-consuming for me to mess around with it in nature. Screwing the filters on top of each other in order to get further adding gradations is fiddly. There are enough individual ND filters, but each time you had to change the filter again...

With this filter here you basically cheat the whole handling. I wasn't even aware that something like this existed. Therefore I have attached a small video so that you can see the function. Even if there is "only" ND2-32 here, you can see what these products can do.
A matter of seconds, especially for experimenting, sometimes using a different filter setting. With low filter strengths, the camera automatic is sufficient and you can see the current exposure time when adjusting the filter if ISO is fixed. In this way, soft water structures can be created in relatively bright light, or soft clouds in the sky, etc.pp. I didn't really notice scattered lights or reflections, but I work on that on the PC anyway.

The price for this product is high, but considering that this covers several filters, again not too bad. However, the general question is what kind of filter do you really need. I previously had an ND8 and an ND1000. Sometimes an ND 4000 would have been required (to safely create "deserted" objects/places).

Nevertheless, I find the concept here really innovative and practical.