Experience with Da-lite Dual Vision?

[Cybertrooth]

Ooops. Newbie here. Posted this first in General Projection, because I didn't know there was a section just for screens! So...

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We are about to purchase a portable video system for our church. Main use will be in the fellowship hall using rear projection, but at other times we may want to do front projection.

The Da-Lite Dual Vision screen seems ideal, but I'm wondering if it's too good to be true. I found only one review, which said (and showed) it blurry on front projection. Our most common and critical use will be rear projection. Anybody used it for that? How does it perform?