Rolling Twenty,
It is a great and rewarding experience! However, as stated by others, you can get "sucked" deeper than you might wish! I am still a CI with my local Squadron at 77 years of age and enjoy it immensely. Many years in Royal Air Force (and other Air Forces) before this and I am now thinking of giving up. It is not because of the Cadets, who (if I remember correctly, are just as keen as I was in 1952!) but because, quite rightly, you do have to give a great deal more time than you might realise and cope with (in my eyes) a great deal more officialdom! That said, it is probably the best youth organisation in the UK!!