For such a low price, my expectations weren’t very high but boy this product delivers. For the price of a single screw on ND1000 filter you get a holder plus a 100x100mm ND1000 filter.Attaching the filter holder is simple: simply screw on the appropriate adapter from the supplied adapters, then snap the filter holder on by pulling back on a lever. Then slot the filter glass in one of the two slots and you’re ready to rock and roll.The holder holds the filter glass securely so there’s no worry of it slipping out, regardless of orientation. The only potential finicky part is attaching the holder to the step up ring — you’ve got to ensure that it’s actually secured, because it may seem secure but actually isn’t. After a little practice, you get the feel, easily.As for picture quality, it’s very good. Little to no color shift that I can see. Great clarity with no distortion that I can tell. It appears to not vignette at 16mm on my Nikon 16-35 f4, though I’ll have to doublecheck. Absolutely great value for the money.And as I mentioned earlier, there are two filter slots in the holder, so you could potentially stack NDs, or stack an ND and a graduated ND, or whatever. One thing that would have been nice would have been a way to also use a rotatable circular polarizer, but for the low price, I’m not complaining. Might end up picking up a square circular polarizer for when I’m shooting over water.All in all, in you’re trying to get into long exposure photography and want to try 100mm filters without breaking the bank, yet still get great image quality, this is the one to get!