This is nice. But less space-efficient than CSV when its strictly tabular, since CSV has columns legend on first row allowing 'pure' rows, whereas JSON will have to key every field, on every row.
["Name", "Session", "Score", "Completed"]
["Gilbert", "2013", 24, true]
["Alexa", "2013", 29, true]
["May", "2012B", 14, false]
["Deloise", "2012A", 19, true]