i am appalled that I received 6 sets of 4 when I ordered 2.  When I called about returning them I was told that the order specified 2 and they thought that was all they sent, so they had no idea how to generate a label to return the others.  I am waiting for the warehouse to let me know what to do.  In the meanwhile I am being charged for all 6 sets.  Not a good sign for dealing with this business!!