Both from the technical side (the app) and the support side, ANZUK is great! Usually the day starts at 6am, waking up and marking yourself as available, which is then followed by a callback (or in most cases, nothing). If you do manage to secure a shift, you receive your hours and placement for the day and can commence. I've made very positive experiences with the schools in terms of how they prepare you for the job.
Sadly, I cannot give them five stars, as it is very unlikely to actually be hired for teacher assistant/teacher's aide work. If I am lucky, I get one shift a week (usually thursday or friday). That is not really ANZUK's fault, as there are simply too many qualified TAs around Melbourne, but nevertheless, it does put a hamper on the whole experience.
From what I have been told, if you get a VIT qualification and get work as a casual relief teacher, the pay and shifts are much much better, though.
ANZUK is also very supportive in helping you find a more permanent position at a school, which is very helpful!