I love the idea of this, and it seems like a great execution EXCEPT I happen to run Linux and I have not been able to find a single tool pdf tool that will let me use this product as described. So far, I've tried a dozen, with results ranging from showing every single layer, to showing just the first layer, to not showing any layers at all.
From what I can tell, if you live in the Microsoft world, this would be a great little item. I live in hope that Linux will catch up soon.
[3 of 5 Stars!]