it's a matter of preference. You'll notice the revs drop faster in between shifts and it's a bit harder to slip the clutch to get going on a hill. Some can deal with it, some can't. You have to give it more throttle than usual to get the car some slip in the clutch.

I have a ACT Prolite flywheel, which is 8.8lbs and it took about 2-3 days to get used to it....after that, it's all gravy