Yes, I was worried about the seam, but as soon as it's dark and movie is on - you can't see it at all. It's BOC and has no hot spots and provides excellent imagery.
For now, it's stapled to the 2x4s that get the screen attached and tight. I have pockets sewn into the top and bottom and plan to go 2inch PVC for next season. Not sure if I'll need side pockets as well if I get the top and bottom spacing just right and tight enough.