First,if things are right,you don't NEED it.They do work nice though when properly set up.If the brakes were bad before,they have to be brought up to snuff before you install the floaters.It is not a magic bullet to cover up poor brake parts.It sounds as if you have something wrong in there.I've looked at cars where people have installed them,then complained the brakes were no better.They tried to get around fixing things that needed fixing by buying the $100.fix.Everything has to be correct for it to work as it should.VERY important to arc the shoes,center the rears using the special pins he sells,make sure the cotter pins don't hang up,making sure you have the correct angle on the front lever before you even start,all of the things that have to be done on the A brakes anyway.