based on the reviews it looks like its pretty weak.
I just bought an electric pressure washer. They are much ligher and more compact than a gas pressure washer so they are much more user friendly. The pressure is less than a gas one, but that is only an issue if you use it on your driveway.
Its perfect for washing cars/trucks/campers because it only runs when you pull the trigger. Unlike a gas one, that you would have to start/stop the engine.
And its easy to drain it and carry it to the basement for the winter, so you don't have to worry about freezing.