Well built, smooth rolling casters, high quality metal construction. It works efficiently as you would expect and is well worth the premium over lesser models.
Used it for the first time. Cleaned my paver walkway and driveway. I did a good job overall, but I had to go over the really dirty spots with the pressure washer and spray nozzle. I was using a 2500 PSI pressure washer, so maybe it just isn’t powerful enough to remove those stains with the surface cleaner. The surface cleaner can handle up to 4400 PSI, so maybe it would have worked better if I had the stronger machine. I will say the wheels are a blessing - worth the extra money.