I was unsure how well this material would perform in providing a solid backgroud, however I needn't have worried. While it is slightly see-through, once images are processed in photoshop you have a really clean, solid background.
I ordered this black background over a month ago and it still hasn't arrived. I work as a professional portrait photographer and this is not the kind of service I appreciate. I have ordered another background in the meantime, it arrived 2 days after me placing the order on Amazon. Poor service, best avoided.