The first sink we ordered arrived with multiple cracks and just crumbled when we took it out of the box.  I called immediately and they assumed it may have been dropped during transport.  They sent out another sink that arrived and upon the plumbers installing it, found there was a bow in the bottom of the sink.  I again called to report it, but since there wasnt a crack, there wasnt a replacement.  They did note that I called on it and extended the warranty to 1 year.  It is embedded jnto our quartz top now, so i am hoping the bowing does not become an issue.  It is beautiful, for certain.  Just cant seem to get one that is top grade???