The gradient filter is a nice addition, but something can be solved well in Lightroom or Photoshop. The situation is different at the ND graduated filters from, because that may very well help to get a uniform exposure. Especially in the course of filtering, this system is superior to a screw-in, because the effect can be adjusted by simply moving the filter as you like.
Filters sit quite tight in the holder, which, however, can quite get over at this price. Was delivered quicker than stated in the offer.