There is a video about Slate on the main Screen Innovations website:
http://www.screeninnovations.com/

65% light rejection for Slate vs. 85% for Black Diamond.

Considering how poor the Black Diamond screen looks, I hope Slate looks better.

I mean it has sparkles, poor image uniformity, and hot spots.

It's fine for business data presentation, and acceptable for extremely poor condition front projection of video, but for quality home theater, it is far from ideal.

Since many are looking for home theater solutions, my recommendation, especially based on price, is to get blackout shades and apply a dark coat of paint to the walls and get lighting under control.

In a boardroom, I would go with a really bright projector and either black screen based upon budget and the sparkles aren't so bad as to destroy PowerPoint presentations and the added contrast is far more critical to quality in that situation.