I personally am not a fan. Some people love them. You have to rev the car up and ride the clutch too much in everyday driving (when starting from a stop) in my opinion. Less weight on the flywheel equals less inertia to get the car moving from a stop. If you go lighter, I wouldn't go any lighter than 12 pounds or so. I would try to find someone with one and drive their car and see how it feels to you.