Before buying, confirm your drone is the DJI Air 3S. The Mega Pro Kit is made for the Air 3S camera fit, so it should not be used as a general DJI filter kit for Mini, Mavic, Avata, Osmo, or older Air models.
Also check whether you need a large filter range. This kit is useful if you want ND/PL filters for bright outdoor video, polarizing control for glare, and high-strength ND512 or ND1000 filters for creative long exposure. If you normally shoot only casual daylight clips, a smaller everyday kit may be easier. If you shoot often and want flexibility, this is the stronger choice.