Richard:
What the hell is a shutter collection? I ordered, and quickly received, one of their ND/polarizing filter sets (3 filters) for $99, but I did not see any shutter collection. Am I missing something here? In any case, don't "hole" your breath too long; I'll have to come over to resuscitate you.
Seriously though, my filter set arrived a few days earlier than promised and it is quite decent quality -- for drone photography. I hobby around with cameras and usually a single filter with ND and polarizing runs into the hundreds of bucks! On the other hand, these filters are rather small-ish compared to many camera lenses, and that would certainly drop the price.
The polarizers definitely enrich the contrast and punch up the colors on the photos -- I rarely do video -- and are also good for protecting the underlying lens. I think you'll be happy with these filters -- or shutters -- whatever.