I am not knocking wfp. As I said earlier, I have never used wfp so I am not in a position to compare the two.
What I do know is that due to the way that I work (ie painfully slow with a micro managed attention to detail), I achieve results that my customers are happy with, and that I am satisfied with.
I personally like to be close to the glass so I can see the results up close. I know that I would worry myself sick that if I were cleaning glass 10-15 feet away from me, using a brush and gallons of water, that I would do a poor job because I couldn't see well enough fom that distance. It's just my perception of how I would feel if I were to use wfp, and wish to point out that I am in no way insinuating that wfp is poor. I am sure you guys do a great job.
John