This is an outstanding piece. I repainted mine:
It is very sturdy and well-constructed, overall. Riveted straps feel solid and completely useable. There is thick padding for the back of the arm. If I were using it as a functional piece, this would give me some confidence in the shield. I don't think it would stand up to serious abuse, but the historical originals wouldn't have, either.
The only possible knock on it is that the canvas it's covered with blistered a bit when I was painting it, but this is likely a function of the paint I was using and being exposed to the elements. Not worth a deduction, though, since this is both outside of what it's designed to be used for and not even a serious issue. 5/5 - highly recommended.