I like my Mayhem. (I have the 46 U C Do but not the 60, the 46 is an awesome plane) The Mayhem seems to be a solid plane. My impression is that Sig makes a more well built plane than Great Planes and it shows. One very nice thing about the Mayhem is that it covered with Ultracote and it doesn't wrinkle as much as Monokote. The problem with my Mayhem is that it's so nice and beautiful that I'm really conservative at flying it. I thrash the heck out of my 46 U C Do because I'm really hoping to get a new one so basically I fly it like I stole it. But my Mayhem is so sweet looking I fly it very carefully..... [8D]