This product hits an excellent balance of value and a premium experience, as K&F always does (I own a lot of their products).

All of the filters fit securely and reliably.

Filters are incredibly useful tools to have in your arsenal, especially nd filters which allows you to fine tune your exposure triangle irrespective of the amount of light in the environment you're shooting. The variable 2-32 nd filter has more than enough adjustment for standard usage. I didn't notice any of the dreaded 'x/cross' effects you find on cheaper filters.

The wide angle attachment increases the FOV from 92degrees to 118, which may not seem like a lot but does make a big difference, especially if you're a vlogger - it means you dont have to stretch your arm very far to get the same/greater FOV.

I think the black diffusion filter changes are very subtle and I doubt I will use this one much.

The CPL filter does certainly do the job in very harsh conditions, though you do need quite specific conditions to justify switching out to this one.

Given the hardened glass and K&F reputation I don't have any concerns about longevity of the glass, protective coating, or mounting mechanism.

Lastly it all comes nicely presented in a neat plastic case with foam inlay so everything stays neat and organised.

Overall I am very pleased with this product.