HAS Holden hit the baby car jackpot or is the new Spark another critical misfire? Obviously, value-seeking buyers don’t seem to care, since they buy the continuing TK Barina in their thousands each month despite its bad reviews. But the MJ Spark – the company’s smallest, cheapest and greenest car ever – needs to re-inject some credibility into Holden’s light-car line-up if the brand is to go up against the mighty new Nissan Micra. Does it succeed or is the Spark another South Korean fizzer?