This is a nice ND set. It covers the base levels you'll likely need (vs an adjustable one) and is quick and easy to use. It has a couple of great things going for it (along with a few shortcomings).

If you are doing landscape photography, you'll likely want a mix of long exposure and shorter exposure images. It's time consuming to add an ND filter on, and to switch it out every time you want to change the power. And if you use a variable ND, you often get a color cast or vignette. The magnetic design is a handy solution. You put on the magnetic ring and then are able to quickly switch between filters. It's a great time saver.

If you shoot wide angle, thicker filters will likely add is some vignettes to your images. These are super thing profile ones and don't shot at 16mm (perhaps even wider???).

The challenge is using other filters or a lens cap. Once this is installed, you'll need to unscrew it to add in a polarizer, UV filter, or a lens cap. They do sell Nano-X filters for all of those - so you could buy into the system, as a solution. For me, I generally know I want to do ND work when using it, so it hasn't been an issue.

Great value for the price.