Evidence: during the 79-second recent test-flight, this prototype planetary lander went up 142 meters, scooted sideways, and made a mid-course correction during descent to land within 25 centimetres (10 inches) of its target.
Or, to quote the Flight Test 8 video caption, "Initial data indicates a nominal flight meeting all test objectives." Here's the whole test flight sequence in all it's rocketry glory:
Not bad, especially considering the second test flight literally crashed and burned.
Update: The Bad Astronomer wrote up a longer piece that covers different aspects of the flight.