its good but certainly aint got good scrub power im afraid dont know what you been using? Its good for regular cleans 
i don't think they have good scrub power either, i got one of the first batch of the duel trim ones and there was about as many inner bristles as a toothbrush on them don't know how many more have been added since but wasn't impressed with the amount with the one i got although to be fair that was the only thing for me that let them down, i'm looking for a new brush now just don't want to risk buying the improved one if it roughly has the same amount of bristles as there not cheap..
paul
Hi, I think I met you cleaning in Saffron Walden. I stopped to have a look and chat about your sl brush. I was not impressed by what I saw but have recently taken delivery of one and my impression is that with the changes Alex has made, it is now a good brush and worth the money. (Only used it for 2 days though).
hi dd
yeah you did thanks for that input gonna wait till the next new version ones come out and try them
hope business is good mate
paul