I have found that what I gained from my exchange has actually developed and improved more over the last few years. So in a way, the things you get from an exchange stick with you and continue to be of use well beyond the exchange year - I guess they will stick with me for life.
(Please note that you CANNOT apply to the North Star Rotary district featured in the above video. NZ applications must come via this website. Also note that D9920 exchange countries differ from this video and students must be under 18 at month of departure.)