Performs better than advertised at an excellent price. It fills my GK1 Huben faster than I can load it with pellets. Inline filter seems to be catching moisture which is a plus. So far I have had an excellent experience with this compressor. Probably filled the GK1 ~50 times. I did burst a valve by trying to fill to higher pressure it was nice to have some spares. Finally inched it up slowly until I am happy with the pressure achieved and I do not burst the valve.