This is my first pressure washer, but not the first time I've tried to rehabilitate a wood deck. I tried this pressure washer on an old deck that has not been cleaned or maintained for at least a few years, as well as on a brick paver.
The washer is rather straightforward to use, though there are a few minor procedures that the instructions say to follow, stating that failure to follow these could cause damage to the unit. These included allowing water to flow through the unit with no attachments and with the motor off. Not a big deal but shows that one needs to read the instructions before using. The unit comes with three heads, one is for soap and results in a low-pressure flow of water, a "15 degree" head that gives a bit higher pressure stream, and a "turbo" head that gives the highest pressure as well as a slight circular motion to the flow. There is also a soap tank, which is easy to fill but there is no way provided to switch the soap flow on or off, nor a means to empty the tank without using up all of the soap (this feature would have been nice to have).
I first tried the unit on the old wood deck following the instructions and using the soap head. This gave a nice stream of soapy water (I used soap specifically intended for wood decks and pressure washers). I then rinsed this off, and it did not seem to do much to the deck. I ended up switching first to the 15 degree head, but then settled on the "turbo" head to finish my work. Though the instructions seemed to not recommend the turbo head, this gave me the best results and removed the buildup on the deck. I am sure that I was slightly abrading the surface of the deck, but for this sort of work this was desired. This quickly brightened up the deck and gave me much cleaner looking wood. This time I was just trying to remove the bad stains, but in the Spring plan to re-stain the deck: in that case I think I may forego the soap in the unit, and instead will lay down a stripper using a separate sprayer, then rinse the deck with the turbo head using the pressure washer. The photo I provided shows side-by-side the pressure washed area to what I had before. It definitely needs more, but great start. Again, the deck was probably not maintained in years though it is still structurally sound.
I also tried the "turbo" head out on brick pavers. This cleaned the bricks very well and much more easily than on the wood. The bricks also suffered the years of neglect like the deck. The cleaning brought out the reddish hue of the deck, removed mildew and stains, and even blasted off the weeds growing in between. This application is ideal for this unit.
In summary, I like this pressure washer, though it seems to have not as much power as I would have thought. Gas driven washers likely have a lot more power. However, this unit seems to be just fine for most household uses and I like that it simply plugs into the wall. One complaint though is that I was forced to use an extension cord, since the GFCI included on the plug prevented me from plugging the unit directly into my exterior outlets. This is going to be a common problem since Code now requires the fully enclosed covers for exterior GFCI outlets. The GFCI should instead be placed on the unit itself rather than the cord.
Easy to Store, Easy to Use, Good Size & Weight, Light Weight
gfci in plug gets in the way, no way to shut off soap or drain from tank