Straight out of the box, this filter kit feels well made and solid. I have been using it over the past couple of days mainly for outdoor action footage and travel clips, including walking shots, bright daylight scenes, and reflective environments such as water and glass.Installation is straightforward thanks to the screw-on design, which mirrors the original lens cover. Each filter threads on smoothly with no resistance or wobble, and once fitted, it feels secure with no concern about it loosening during movement or vibration. The slim profile also means it works fine with protective cases and accessories, which is important for an action camera setup.In real-world use, the combined ND and polarising effect makes a noticeable difference. Exposure control is much easier in bright conditions, allowing slower shutter speeds without blowing highlights. Motion blur looks more natural, especially in walking footage and panning shots, which helps reduce the overly sharp, jittery look common with small sensors. The polarising element also cuts glare effectively, particularly on water surfaces and shiny pavement, while boosting colour saturation without making footage look artificial.Optical quality has been very good so far. Footage remains sharp across the frame with no visible loss of detail, colour shift, or corner softness. The multi-layer nano coating seems to do its job well, as reflections are minimal and the surface resists fingerprints and water droplets better than basic filters. Light rain and splashes bead off cleanly, making them suitable for outdoor and wet-weather shooting.The range of strengths included is practical. Lighter filters work well for overcast or mixed lighting, while the stronger options are useful in harsh midday sun. Swapping between them is quick, and the engraved markings are clear enough to identify the filter strength easily when working on the go.One small downside is that, as with most ND/PL combinations, you need to be mindful of polarisation angle. Rotating the camera relative to the sun can slightly change the effect, which may require a bit of trial and error when framing shots. It is not a flaw, but something users should be aware of if they are new to polarising filters.Overall, it has met my expectations and I would recommend it if you are looking for a well-built filter set that offers solid optical performance and better exposure control for action footage.