Despite the incessant leaking, the AR118 did an impressive washing job. It produced a powerful enough stream of water to partially strip the paint off the porch and deck, so it's a good thing I planned to paint them afterward. The AR118 also did well in power washing my house's vinyl siding.
Made in the U.S.A., the AR118 comes with a 30-foot power cord. Its 20-foot water hose means I could leave the unit in one place for long periods - I didn't need to keep dragging it around. I recommend making sure you have a decent garden hose for the job, though. While I was washing my porch, the garden hose kept bending into kinks, impeding smooth water flow and slowing progress.
Naturally, a relatively small, lightweight unit such as the AR118 takes longer to do its work than a more powerful, expensive washer. The AR118 actually did a better, faster job than I expected. Hiring someone to power wash my porch and deck would have cost at least $100. I paid about that much for the AR118, which has a one-year warranty (for residential use). I'll use it again to power wash my house's vinyl siding, once I recover from the porch and deck painting project.
You'll get a great upper body workout from power washing, but I don't recommend doing this yourself unless you're in pretty good physical shape. Pressure washing takes a large amount of physical stamina. You don't want to run out of steam halfway through the job, or worse, give yourself a heart attack. You could also hurt yourself if you don't have enough strength to maneuver the sprayer properly.
It's worth it to pay someone to do your power washing if your body isn't up to the job. You also may want to consider hiring someone with their own water if you use a well that tends to go dry quickly or if you pay unusually high amounts for your city water service.
Though I can't speak for the AR118's durability since I've used it for only a short time, the device seems well made and did what I wanted it to do.