Sig Something Extra is about as easy as it gets. Nice laser cutting, and great instructions. One of the first kit planes I ever built, and it was a piece of cake. I would only suggest that you carefully mark the part numbers on each piece of wood before you get started. The pieces will fall out of the shucks as you handle them, and get mixed up if you don't. Just makes it easier, although it would be nice if they would have etched the numbers on each part with the laser.