The processing of the protective bag is very good. Nett are also sewn reflectors. Whether the now sufficient for the darkness, I may doubt. But it's a great idea and that was not the purpose of the bag.
I use my S4 with a plastic cover and a protective glass plate, everything fits together well into the pocket. It is then still a little too large, and the film may wrinkle, so that the operation is not easy, but not too hard.
I personally do not mind, because it would annoy me if I had to arrange the casing from the cell phone every time.
And the operation is nevertheless indeed possible! So it does the job.
In light shower it is waterproof definitely how now I want to look at the heavy rain did not test well.
What is not seen in the pictures, is that the opening can be closed by a protective flap Extra. I personally feel very good. Maybe I'll even upload a photo of it.
So far I have taken the bag only on clothing. There you sit very well and there is no moisture through.
My runner tops wear sweat extremely outwards and even then everything stays dry.
The two options for adjusting the bracelet are well thought out and serve their purpose.
Everything considered, there is of me 5 stars for a great product. And I would highly recommend it.