Very quiet, great pressure, works great. The downside is that if it shuts down or loses power, you'll have to completely reset all options. The instructions are terrible, it's not clear what's what, but it didn't take long to figure it out. I would have liked a start/stop button. When switched on, it simply starts spraying with the set duration and pressure. So if it loses power you have to turn it on to change the settings and then rush to change the duration otherwise it will spray at full pressure for 2 minutes until you change the settings.