http://www.homedepot.com/p/EZClean-15-i ... eGgR20iwuE
WOW What a time saver! I didn't take a before picture but all I can say this device certainly cut down on the time to pressure wash the concrete deck. Here in Florida it has to be done at least once a year. It normally took two days but with this it only took about 3 hours.
It is easy to use, you do have to go back and rinse off the deck afterwards. The price isn't bad considering the time saving you get. I did rush an area or two and needed to go back over it but that was my fault for rushing.
It does have excellent reviews at home depot.
Hope this review helps others. (My friend Thom told me about it, passing it on.)