I am suitably impressed. I have a Simpson 3100psi power washer with the Honda GC190 engine. I also have a big driveway, and I power washed it the other day using an old 15" spray disc with no wheels. By the time I was halfway finished I'd already decided to save my back and buy a spray disc with wheels- preferably 4 since I was worried about dropping a wheel off the sidewalk or into an expansion joint and I assumed a 3-wheeler would get high-centered with only 2 wheels on the ground. So I picked out this 16.5" Westinghouse. When it arrived, I wanted to try it but with the driveway recently completed I had nothing left to clean; so to the amusement of my neighbors, I went out and power washed the street in front of my house- years and years of concentrated dirt. To compound things, my neighbor on the uphill side (God bless him) had decided to spray all the mud and muck off his sidewalk and into the street, which flowed downhill and settled nicely in the gutter area in front of my house as well. So all in all, it was a nice test. Here are my impressions: First, this thing is heavy. You can lift it ok when attached to the wand but I can't imagine trying to lift it when using the extensions that come with it. Second, this thing rolls like a dream. It rolls forward and back and sideways with almost no effort and changes direction with no hesitation. I was frankly surprised, since this is what I was hoping for when I gave up on my old disc in the first place. It rolls so easily it kept trying to roll away from the natural crown in the street and bump into my curb (it's heavy, remember?). I learned to compensate my strokes, and after a while we got along fine. Third, it does a fair job at removing dirt. Thin layers of dirt in the street came up in one pass, but as the dirt thickened and became darker I had to run over it 4-5 times, and even then it didn't get all of it. For those spots I went back over it with the green 25 degree nozzle, and it still only came up with difficulty. It is rated to 4400psi - perhaps if my machine was more stout I'd be writing different words here. But I suppose there's a balancing act going on - more power, jets closer to the ground, etc. would make dirt removal better but it would also etch my concrete driveway more. As it is I think this disc and my driveway will become fast friends. I do recommend it, even with the weight.
It did a wonderful job, especially compared to other machines I've used. It cut the job time in half, more than half! I would highly recommend it. It was easy to manuever and control in any direction.
This is a great addition to the pressure washer, just don't rush it. it cleans really well on stamped concrete and on regular concrete, and save your time and back.