Hi - I must confess, this is the first I had heard of this thing. Must lead a sheltered life.
Specs on it are kinda confusing. 3000 psi and .31 GPM ought to be more than enough for a house and deck. I was getting the specs off the CPO website and not real sure how the "dual purpose" gun works. Reviews on the HD website look reasonably good.
I guess bottom line is I don't understand all I know about this thing, if it works as advertised, looks like a good thing. Of course, that can be said about most everything. The only thing I would suggest is to make sure it will push at least 50 ft of hose. With only 25 ft, you may have to decide whether it's easier to move the spray past the house or the house past the sprayer