After putting some more miles on the car, the springs do feel a bit bouncier now, but not something that is really noticeable. I only experience the suspension bounce of the car in certain road conditions, otherwise it feels just like stock. I can't say if the car handles any better though (if it does, then it will be a small difference) since I haven't been back to the track with the springs.
I'm used to daily driving my GT3 and R35 GTR (with KW suspension), so the ride quality of this car even with the springs is obviously much better than those two cars, so my perspective might not really match up with the users on this forum who are looking for maximum comfort, in which case, you shouldn't be modifying your suspension/exhaust/etc anyways.
