The canons are made smaller now so the problem of knocking them off are near impossible now. It's almost impossible to knock them off now this modification has been made. First day I used one I knocked most of them out, second time using one with reduced canons and a bumper bar fitted overcome the annoying problem. The swift brush is the lightest and fastest to work with. It is actually a very good brush. You can all take the mickey, I couldn't care less if it allows me to work quicker and more efficiently. IMO it's a very good brush.....just very overpriced. For normal houses it's my first choice brush and I wouldn't substitute it for any other brush.
Everybody has their favourite brush and everyone is entitled to their own opinions but unless you've tried one you can't give an honest opinion, all you can do is praise them or criticise them like all the other scaremainering trolls who don't have an open mind and aren't willing to try new things.
I've tried many poles and brushes , some are brilliant and some are total rubbish, at the end of the day it's down to everyone's personal choice why they choose what works best for them.