If it flys well and you are in a warm weather climate I would probably not update firmware. Many would love to go back to 1.1.9 firmware.. If you are in a cold climate then I would say it might be worth it to upgrade firmware to 1.6 for the cold climate revisions made to the battery's circuitry.. I am on 1.6 now for this reason, not because I really wanted it. But I can say after over 50 flights with 1.6 I haven't had any issues with it either.