I really enjoyed this film. It had a wonderful balance of seriousness and fun (a movie with the incomperable Graham Kennedy is always going to attract laughs!).
It treated the political issues around the Vietnam War in Australia with some sensitity. The two diggers who return realize that it is unlikely they will be treated like heroes, given the unpopularity of the war.
Great to see that the tactital fighting stuff was done realistically - they actually bothered to speak to the forces about how ground patrol and combat is carried out. So we had the hand signs, the command to 'break contact', and the withdrawing from the skirmish in correct formation. So many movies never bother to do these kinds of things properly - so you have police turning in to do searches without showing any ID (and not beiong challenged), masseurs who have bad manners and don't know what pettrisage is (eg in the Suite Life).
This movie at least bothered with these kinds of details, so full marks for that.
On the other hand, the 'Vietnam Jungle' looked like Australian rain forest!
Add to all that, some of the priceless humour - the chaplain was portrayed as a normal human being, and the soldier's gift to him, the wanking device, was priceless!
All in all, a most enjoyable movie which was well-balanced between the serious issues around war, and the male humour which helped the soldiers cope with the situation!
Finally, really well-cast; it was not just Graham Kennedy and a whole lot of other people that happen to get into a movie.
Not a masterpiece, but certainly above average.