got a few "black box" rims here which the mates used to rib me about being made of baco foil, but i never had any major issues with them.
didn't find them any different to any other single wall rim (araya 7x's) i used.
only strange thing was the major differences in chrome plating quality between ones i bought from different shops.
one set had good heavy chrome, the other was so light u could still see the rim extrusion marks through it.
Bp.