There's no doubt in my mind that this is one of the most useful tools I've encountered so far, especially if you're one of the designers who prefers to draw the whole overall landscape first before adding details to it! However, this tool is only limited to generating a map with a size up to 255x255 maps, and it only locks to the top left 255x255 pixels corner of your imported image. With that being said, if you're going for bigger maps, you'll have to divide the map generation into 4 separate pieces, and use the "Map copy" tool to achieve that goal.
Quality/Instructions: 5
The instructions are also clear. In fact, this tool is simple to use. Just click the "import" button to choose your image, and click generate and it'll show a preview of the map generated in in-game color. (you can have different kinds of terrain generations in lots of styles, that you can check with the provided color palette. The image map color doesn't have to be precise to match the palette's colors either, but a general advise is to color your map as accurate as possible so the terrain generator won't misplace intended terrain with another terrain with a similar shade.
Additional Comments:
Overall this is a must-download tools for designers who wants to convert world map / fictional maps straight into aoe 2 maps, or for peoples who are just curious to try this fantastic of a tool out.