There are plenty of us on this forum who were traditional before switching to water fed pole including myself, I never had any complaints with traditional methods and I don't get any complaints with WFP.
I will never let my customers decide which method I use as most are ignorant of the regulations, I have WFP and the regulations clearly state if an alternative safer method to using ladders is available then it should be used, simple really.
IMO Wfp is better and most on here who can do both would probably agree, some do seem to have problems but that's most likely down to poor technique, in general I think some who have been cleaning commercial property's since the conception of WFP seem to struggle with with the idea of it being suited to domestic, probably due to a lack of training and advice on its use.