Well the quality is not super, but Ok. Some details that are in plastic (stones) may break if you are not carefull. But the all-metal things have been Ok so far.
The back of their riveted conchos are just like a spot-stud; you put on the female cap (included) and hammer it flat to secure it to the leather. There is quite alot of force used to this, and the conchos don´t break , so I guess they are quite sturdy. I only use a rubber cutting-mat underneath during this pricess; if you use it on a bare anvil, it might deform the concho.
My guess is that it´s the same design as in the states, there wouldn´t be much of a point to make it different over here, I think?
If you want I can get a picture of the backside of a few?