I'm very satisfied. The 600 does a good job for a year. With 600 LEDs, the performance is sufficient for exterior shots. The 300 I have, many times I take only those with because it is more compact and can also be used very well by the Lechtkraft. The price / performance ratio is very good comparable Leuchkraft by a brand manufacturer will cost 4 times as much. The build quality is absolutely fine. But you should make sure that you used strong batteries because it is power hungry due to the strong performance.