I tried one when they 1st came out, BUT 4 those that are used 2 using vikan mono sill brush - which is VERY heavy, but bomb proof & good scrub power, plus u can swipe v dirty sills, and just flick the dirt off! (rinsing off glass!) I found changing wasnt 4 me be BCOS, although the gardiners c brush is v v lite! THE jets of water (FOR ME) shoot 2 high for those that are used 2 using the vikan!! I even thought about drilling the jet holes central, because i liked it that much!, but this would have been hard to get the angle perfect? So i just stayed with the good old HEAVY work horse - It would be good if alex g could do a central jet option, because i WOULD buy them!! NB: Best poles though!