naff??!
no mate... I use it ALL the time... it does for everything... and it is much much better than Megs APC
try it in your home too (not food safe), tiles etc come up brilliant with it
it dilutes 10:1 so your 5 litres will make you 50 litres - for a tenner thats an absolute steal... I have a 25L barrel that I dispense from
G101 comes from its name... General Purpose 101 uses