The polarized filter comes in a very attractive presentation box. After unpackaging, I found that there is a nice plactic case that holds filter, and conveniently is able to store the microfiber cloth. The whole arrangement fits in my jacket pocket.
This polarized filter is super useful when I head out on a boat trip and want to take pictures of whales or sharks in the water. The polarized filter removes all the surface glare on the water, and allows the camera to image things that are under the water. The form factor of this filter allows me to quickly use my iPhone to take high quality pictures on the water.
The tradeoff for convenience in this case is this: It's a little clumsy. I won't be attaching the filter and putting the whole phone/filter assembly in my pocket. But that's OK, If I want to take better than average pictures, I will usually have my phone in my hands for the whole picture taking opportunity.

The optics on the filter are impeccable. The build quality is similarly very good.

I recommend this product to anyone who knows what a polarizing filter is for and wants a quick and convenient way to improve their cell phone picture taking game.