ive got the exedy flywheel and I'm quite happy with it. Yes it is noisier down at super low revs, its tricky in the car park and yes it does take a while to get used to, whether its the combination of both the cushion button clutch and flywheel. Strangely I find that it takes less revs to get going as once its engaged it just wants to go. Accel is alot smoother but at the same time if you'r not used to it it can become quite rough. I dont have any issues with gear change, that may be due to the short shifter and my driving style which is cruzy. I don't flog the car and smash gears. Rev matching is alot easier. Along with a slight tune it was a completely diff car to drive.
If your really concerned about a smooth comfy ride then stick with the stocker, I personally think its a good mod, just dont go super light as its uncessesary, thats why I got myself the exedy one instead of a super light one. There's no real major draw backs to make me want to go back to stock.