Because of all the varients in circumstances inc' location, type of work, personal etc. etc. WFP will have a different affect for everyone. So to make statements like the ones above is very short sighted & quite silly IMO.
Because of all these differing circumstances WFP will benefit some 100%, some 90%, some 80%, some 70%, some 60%, some 50%, some 40%............etc. etc.
It certainly WILL NOT have the same impact for everyone, even when they are doing it right. That's just the nature of it really.
Safety? can't be argued with. The rest is all debatable!

Oh, 6 years WFP here too.
