Back to the old trad vs wfp argument are wee now.
Im off in a mo to wfp some bungalows and maybe a few 2 storey houses to boot if I can be arsed.
If they has any issues they can always call me within 24 hours and I will pop back to sort it out. However none of my customers have yet done so and all say what a wonderful job I do. Go figure ...
Mind it does help if they are elderly, have poor eyesight and nets on the windows. Just kidding
Do you honestly think your going to get a call back over a few spots and runs, its a bit like the crappy restaurant waiter asking
was everything alright, 99% will say they enjoyed the meal and walk out vowing never to return.
Like I pointed out most customers don't pay much if any attention to their windows being cleaned unless they are really bad
and even then some wont notice.
The wfp pitfalls annoy the users more than the customers unless your wise or stupid enough not to know or care.