On April 11 I cancelled our most recent order from kncminer.  On April 24 I received a "refund" that is short of the correct amount by more than $6,000 USD. I've gone round and round with support staff about this, and the final word (from Sam) is that they have no intention of paying me one cent more.

Sorry to pile on to this, but I thought it best to let you all know.