The unit does pretty much exactly what I expected. This was easy to assemble, runs on plug in electric power, and is simple to operate. I would not want to use this for something as large as an entire car or for a task requiring a long stream such as washing siding or high windows on a house. I bought mine because my knees are griping if I get down to scrub the floors of showers and tubs. This was pretty effective at taking off built up soap film and flushing it away. The stream is easily adjustable from a straight stream to a wide fan. As shown in the ad, a siphon hose is placed in a water source, the pressure hose and nozzle are snapped together, the unit is plugged in, and it is turned on which pressurizes the system. From then till the water source runs out or the unit is turned off each time you operate the trigger it sprays and turns off (still pressurized) when the trigger is released. Very intuitive. The instructions do not mention ground fault protection, but most bathrooms are required by code to have ground fault protected circuits. I would recommend weighting the bucket end of the syphon hose. I used the tank behind the toilet as my water source and the tank refills automatically when the toilet tank fill float goes down. To stop you turn the unit off and press the trigger once to release the pressure. Then just disconnect everything and I am storing mine in a wide bucket or tub so that the parts can air out between uses. I was pleased that no connections leaked. I used the shower curtain to block any splashed spray back out of the shower. It did exactly what I had hoped. Very satisfied.