We have a Sport Court that sits on top of concrete. We had Ned Steven power washed it last year. Took them the better part of a day and it came out great. One can't get the dirt out from underneath completely without removing the top court which was not the job, however you can get about 1/2 the underlying dirt out and make the court look awesome if you pass over it a few times. This year same price same service except the guys showed up around 8-8:30 Rushed the job and were packing up by 11 O'clock ... My wife and I went outside to inspect, it clearly needed One maybe Three more passes. The Forman on the Job said that's the best we can do and proceeded to leave. We called the office and spoke with the Supervisor who was deaf to our position and continued with multiple excuses. We simply said that you can't clean that Sport Court properly in 2 1/2 to 3 hours and it clearly was not as good a job as last year which was our benchmark. During this back and forth with the office and I will admit I cursed and was highly animated prior to hanging up, Ned Stevens went ahead and charged our AMEX card for the balance, which was completely inappropriate and in very bad faith considering we did not sign off on the job and it was not completed to our satisfaction. What you see in the pictures is that the blue has areas that are dark and dirty like the yellow where its easier to see. That is surface dirt that can be power washed off . The ends show the dirt where there was little to no effort to clean all the way across or to the end of the court which would move the surface dirt out from under the courts top layer. User's recommendation: Make sure you convey and they understand your expecatiotns.