I've noted two negative points:
1. The enclosed blow gun and inflation device are high so that the work order is not fun. Well, better not cost the earth.
2. More disturbing is that the designers have decided to join a high-pressure hose with the pressure reducer at the end fixed to the device. Both are relatively rigid and hard, so that a directly connected to the device hose Air gun is quite uncomfortable to handle.
An intermediate, flexible spiral hose first to the rescue, but slows down the air flow somewhat. Probably I'll probably eventually open the compressor, install a pressure reducer firmly into the tray and put a bayonet connection to the outside. I would, however, have liked to have shipped from the factory so.
In sum, I am not sure if I would buy the device again. However, a portable compressor as the POWX1721 is already quite a bit larger and heavier.