So I put together a little still life to show the difference between A) No Filter, B) another brand's 1/4 black diffusion, and C) this gold gold diffusion filter.

The first thing to note is that the difference between the nothing and the black diffusion is massive, of course, but the difference between the black and the gold diffusion is much more subtle. You'll notice that the 1/4 gold diffusion has a slightly stronger blooming effect that 1/4 black, but also the light scatters further and because of this there is less contrast overall. I wouldn't say its better or worse, this may or may not be what you want. I would also note that despite the gold particles the colour of diffused light is overwhelmingly the colour of the source light, not just some gold colour cast over the whole image. Put a blue light in the frame and it will diffuse a little bit of blue throughout.

Construction wise it is fairly premium, with a nice grip to it. It is aluminium, not brass.

Overall I'd say this is a 5 star example of a gold diffusion filter and if the subtle difference in look is what you are after then this might be for you. I would say though if you have no diffusion/mist filter at all though I'd certainly start with a basic black diffusion filter that maintains more contrast then check out the subtle difference between it and a gold diffusion filter and figure out if it's worth it.