I purchased an WPX2300e a couple months ago. Used it to clean the green mildew from our vinyl siding. The 15 degree and 25 degree nozzles did the job! Our house looks new again! Also used it to clean the concrete walkway infront of hour house. It had been brown/black. Now it also looks new! This model was totally adequate for the job and well priced. It did take a while given that the 40 degree nozzle didn't clean much. Had to switch to the narrower nozzles. But, we cleaned the whole house in 2.5 hours. I also like the size of this model. Small, light, quiet, easy to move around.