So a couple of tips from my first experience....
- I didn't actually read the directions on Martha Stewart, which said to cut the cookies while still warm. Instead, I cut them before baking. Of course, they spread a little, so the puzzle's not a perfect fit, but the edges are cleaner. I think if doing it again, I'd cut before baking, but I'd just be more careful not to scrunch the openings (like for the points of the star) when transferring the dough to the cookie sheet.
- I used the top of a gladware container to cut the outline, and then either used a cookie cutter or just cut the puzzle pieces.
- I was also really glad that I put each cookie puzzle with all its pieces together on the cookie sheet and then onto separate plates to cool. I had put two cookies together in a container after cooling, and it was way more difficult to put together than I would have guessed. When cutting them, I kept thinking I should try making the designs more difficult because these are going to be way too easy to put together. But even with the icing, they (surprisingly) take a little effort.
- From how they look in the end and how they fit together, I think I liked the ones that have a cookie cutter cut-out in the middle. I think I like the idea of the star and the tree in the top right corner, except that the star has no icing. For puzzle difficulty, though, the bottom left, which is random pieces like the Martha Stewart example, would be my pick.