Why does a dungeon/game master buy a map pack? Simple, so that he does not need to draw complex maps himself. He needs a series of pages that conform to the 1 inch x 1 inch square size so that he can place character and monster figurines directly upon the map.
This map folio contains many 8x11 inch colorful pages of small maps, exactly like in the adventure packs. These maps are very small and have no actual function or utility.
My recommendation is that you do not buy any map folios because I've come to learn that they all conform to this standard, that is, small maps that you cannot place figurines upon.
Conclusion: Do not buy.
Reason: Serves absolutely no function as the maps cannot be directly used in gaming.