After seeing all the posts on here most say that wfp is faster ! How do you quantify that ? Surely if you only had the odd house spread apart it would be a pain to set up ? Could understand if you had a commercial site that had lots of windows . so how is it quicker ?
There is only one way to find out if you are sceptical.Find a window cleaner trade and one wfp. Try and spend a day, 1/2 day with each.You will then understand the concept of each.With wfp you can waist a lot of time if you dont no what you are doing.(If you are trad already then please accept apologies).