Problem transmission in Jazz

My wife's six-year-old Honda Jazz has a vibration at start-up from rest. We have learnt to minimise this irritating problem to some extent by not accelerating quickly from a standstill. I understand that it is the start clutch in the transmission and I've heard of various remedies and estimated cost figures. What do you suggest in terms of a remedy and what are the likely consequences if we choose to do nothing about this problem?