I voted for book. Should I decide to buy such a product I would want a book so that it might last more than a couple of sessions.
I can easily cross-reference my DM's notes with the printed page without having to seperate them, and my players would only see the sections I drew on the dry-erase board as they were uncovered.
I wish they spent more time explaining what the differences would look like. As it is, I generally like my maps to be spread out on the table during play, and easily traded out for others. Hence, I voted folder.
I didn't see the button for "lame, low margin product that should be produced by a D20 company" so I voted for folder.
[rant]
Honestly what are they thinking of doing, publishing the "Map of the Week" dreck in a hardbound book? There is only about a dozen excellent products already out there.
I honestly wouldn't even consider buying a "map" product from Wotc, especially if they resembled in any way the last years worth of "Map of the Week".
[/rant]
Folder products turn into loose page garbage after
about a month of use. Sure, it's a pain to copy stuff
from a book, but I'd rather have something that will last.
They didn't ask if I would spend my hard earned cash on the product, they just wanted to know which I would prefer so I voted book. Honestly I wouldn't buy it no matter what form it took but generally speaking I feel that way about most WoTC materials lately.
I voted folder because they're easier to copy. I'm not worried about them getting damaged or lost, because I take good care of my stuff. Of course, it helps that I DM at my own house.