I've checked the board for fabrication errors and the only small problem that I could find was that the holes for P1 and P2 are a little small. The terminals still go in with a hard push though and it should not be a problem.
If you look at the board it is hard to believe that it is 3oz copper but by running your fingers over the edges of the copper you can feel the the difference. The board is also heavier. The camera and lights make the silver color on this board look like it is copper.