As with most K&F products I've tested, the build quality of this filter is very good and there didn't seem to be any issues with unintended alterations to the image. I've been pretty impressed with K&F products as a whole, actually, and this is no exception. The gold streak effect is pretty awesome and something that I have been interested in trying for a while due to it's uniqueness - I've just scratched the surface with the creativeness that this filter can provide and look forward to using it in different situations. Having said all that, I don't think there's any way I could have justified buying this (it was a free review product) for the cost. The 52mm that I picked up is listed for $32 and obviously the larger the filter the more it costs. $32 is definitely not super expensive when it comes to photography gear but the cost-to-use ratio wouldn't be in my favor as this is an ultra specific filter that will only be used sparingly. I have K&F diffusion filters that never leave certain lenses because they have an in-camera look that I love. This filter definitely wouldn't fall into the same category. It is a really nice filter though and if you're looking for something like this then the K&F would be something to consider.