i have to say wfp is not has straight forward has trad and it can have many head aches but it has a lot of pluses too/
i dont think it faster on ground level but 1st floor it prob is and on commercial were your in one area for a long time.
i sometimes hev my doubts wiv wfp has in my opion a bit of wind on wet windows causes tons of problems and its nearly always windy here but recentky wiv the good weather i can see how after 4 weeks they are still quite clean which feels good!
both are tools and both are needed
