Very good ND filter

I had initially a little scared to buy a variable ND filter, as I got from friends no good reviews.
Then I came across the filter and I've because of the many good reviews struggled through it trying times.

Fully complies with its purpose, however, has a slight blue tint.
Further tune the Min / -Max labels not completely but that you can get over since otherwise the price / performance ratio absolutely true.
Because the blue cast and the erroneous captions there a star deduction, otherwise strong buy recommendation!