Right from the start, the first thing you will notice is the build quality of this filter. It feels very solid in your hand, there are no loose parts, and it has a good weight. I like that it has small handle extensions that you can hold onto to turn the filter. Since the filter takes some pressure to turn it, it's nice to have these so your fingers don't slip. I like that the ND filter has hard stops so you don't accidentally turn it too far, which can mess up your image very quickly, regardless of which brand filter you use.As for color shifting

As for color shift, it's about par for the course for this price range. It's neither the most natural nor the worst when it comes to color shift that I've ever used. If you turn the ND filter on more, it tends to lean toward warmer tones, but that's easy to fix after the fact. I have yet to come across a filter that had no color shift at all Look at my image for a side by side of the same scene, shot with the ND filter and without.

Overall, for the price, I would definitely recommend it. K&F did a really good job with the materials used and also in producing a good quality image.