The clutch in my GD i30 is somehow quirky to use. When I lift my foot, the clutch does not go from disengaged to engaged very smoothly. It's difficult to slip to get moving smoothly, and doing more slipping with more throttle does not make it moving any faster. My former Nissan Almera was pretty much the same about it, but I can't remember my other former cars being like that.
Furthermore, changing gears from 1-2 or 2-3 is also very difficult to do smoothly. The engine rpm must be a perfect match for the next gear, otherwise it produces a semi-sharp thud when the clutch engages. With higher gears it's not that bad.
Also, when lifting the pedal fast while having the gear in neutral, I can hear a faint click coming somewhere under the engine bay. While in the first gear and lifting the pedal to the verge of engaging, the click is easier to hear. If I do some kangaroo hopping deliberately by blipping gas pedal while moving in first gear, the click can be heard each time and it feels like having backlash somewhere in the clutch or drivetrain.
I mentioned about this when I was in the last service a week ago, and the mechanic noticed the phenomenon but of course there was no further action. I guess it wasn't bad enough for them to get their hands dirty, and anyway it's not a simple and fast job to inspect it and possibly replace something to the clutch or drivetrain.
Has anyone of you had similar issues? Without better knowledge it's not easy to demand the service center to do something for it.