I purchased this washer for my rental apartment (tower mansion with large balcony), and I'm extremely happy with the size and overall operation.
Since I don't have a water tap outside, I used a bucket and the filter attachment as the source water. But it seemed like the pump was not able to quickly self-pressurize the water, even though everything was connected correctly.
It's possible that the bucket was too small (not enough pressure?) but it still took a lot longer than I expected for the water to enter the pump...
That said, this is a great product, and if you DO have a water tap, this will work great for you.