The slipper is easier to pull and control in traffic than the 2006 setup.I thought they claimed a 20% difference.I've ridden some new V-Rods w the slippers in them and there wasn't a big difference,but it was noticeable.I came off some little Hondas and an old cable clutch Harley that had very easy pull effort,so this really made my 03 V-Rod seem very stiff.It took a couple of months for the muscles in my arm to build up and now the stock V-Rod clutches feel normal to me.Only reason I havn't installed a slipper in either one of my V-Rods is because the setup I have in them now works great.
The slipper is a nice upgrade and cheap for what they supply,so you won't loose out completely if you aren't totally satisfied w the pull effort reduction.