I should add to my above post that in addition to the MS1000V sample, I also taped a pure white screen sample to my BD screen to make sure that the sparkles I was seeing were not caused by my projector or something else.
I could see no sparkles on the white screen sample.
Did you get your screen hung yet, interested in your results as I'm considering one of their screens with this material.
Also what screen did you get?
I did. I got the Draper React 2.1 Tab Tensioned screen (same screen as Draper MS1000V I believe). I have not seen any major sparklies on my setup. I think its a good ambient light screen considering the price. It does seem to be a gain of 1.0. I am using it in a living room with white walls, white ceiling.